Need help, DNS resolution not working anymore

Iam using is for a couple of years, but had to reintall it, due to a failer in an Harddisk. I got it working for a day and then it crashed, did not find a way to get it going again, so I did reinstall of Debian and an install of pi-hole. It did work now for a day and then it crashed again :frowning:

Webinterface says DNS service not running and FTL service is offline.
DNS is opendns family DNS

PI is also doing MQTT Broker (Mosquitto) and is an unifi controller.

NSLookup on the device it self, says
ping: google.com: Temporary failure in name resolution

Here is de Pihole -d

This process collects information from your Pi-hole, and optionally uploads it to a unique and random directory on tricorder.pi-hole.net.

The intent of this script is to allow users to self-diagnose their installations.  This is accomplished by running tests against our software and providing the user with links to FAQ articles when a problem is detected.  Since we are a small team and Pi-hole has been growing steadily, it is our hope that this will help us spend more time on development.

NOTE: All log files auto-delete after 48 hours and ONLY the Pi-hole developers can access your data via the given token. We have taken these extra steps to secure your data and will work to further reduce any personal information gathered.

*** [ INITIALIZING ]
[i] 2020-02-01:18:58:12 debug log has been initialized.

*** [ INITIALIZING ] Sourcing setup variables
[i] Sourcing /etc/pihole/setupVars.conf...

*** [ DIAGNOSING ]: Core version
[i] Core: v4.3.2 (https://discourse.pi-hole.net/t/how-do-i-update-pi-hole/249)
[i] Branch: master
[i] Commit: v4.3.2-0-ge41c4b5

*** [ DIAGNOSING ]: Web version
[i] Web: v4.3.2 (https://discourse.pi-hole.net/t/how-do-i-update-pi-hole/249)
[i] Branch: master
[i] Commit: v4.3.2-0-g38d8e77

*** [ DIAGNOSING ]: FTL version
[✓] FTL: v4.3.1 (https://discourse.pi-hole.net/t/how-do-i-update-pi-hole/249)

*** [ DIAGNOSING ]: lighttpd version
[i] 1.4.53

*** [ DIAGNOSING ]: php version
[i] 7.3.11

*** [ DIAGNOSING ]: Operating system
[✓] Raspbian GNU/Linux 10 (buster)

*** [ DIAGNOSING ]: SELinux
[i] SELinux not detected

*** [ DIAGNOSING ]: Processor
[✓] armv7l

*** [ DIAGNOSING ]: Networking
[✓] IPv4 address(es) bound to the eth0 interface:
   192.168.1.103/24 matches the IP found in /etc/pihole/setupVars.conf

[✓] IPv6 address(es) bound to the eth0 interface:
   fe80::95a6:a9be:85f0:fa26 does not match the IP found in /etc/pihole/setupVars.conf (https://discourse.pi-hole.net/t/use-ipv6-ula-addresses-for-pi-hole/2127)

   ^ Please note that you may have more than one IP address listed.
   As long as one of them is green, and it matches what is in /etc/pihole/setupVars.conf, there is no need for concern.

   The link to the FAQ is for an issue that sometimes occurs when the IPv6 address changes, which is why we check for it.

[i] Default IPv4 gateway: 192.168.1.254
   * Pinging 192.168.1.254...
[✓] Gateway responded.

*** [ DIAGNOSING ]: Ports in use
127.0.0.1:28017 mongod (IPv4)
127.0.0.1:27017 mongod (IPv4)
*:1883 mosquitto (IPv4)
*:1883 mosquitto (IPv6)
*:22 sshd (IPv4)
*:22 sshd (IPv6)
[*:80] is in use by lighttpd
[*:80] is in use by lighttpd
*:8080 java (IPv6)
*:8880 java (IPv6)
*:6789 java (IPv6)
*:8443 java (IPv6)
*:8843 java (IPv6)
127.0.0.1:27117 mongod (IPv4)

*** [ DIAGNOSING ]: Name resolution (IPv4) using a random blocked domain and a known ad-serving domain
[✗] Failed to resolve jonpoor.com via localhost (127.0.0.1)
[✗] Failed to resolve jonpoor.com via Pi-hole (192.168.1.103)
[✓] doubleclick.com is 172.217.20.78 via a remote, public DNS server (8.8.8.8)

*** [ DIAGNOSING ]: Pi-hole processes
[✓] lighttpd daemon is active
[✓] pihole-FTL daemon is active

*** [ DIAGNOSING ]: Setup variables
    PIHOLE_INTERFACE=eth0
    IPV4_ADDRESS=192.168.1.103/24
    IPV6_ADDRESS=
    PIHOLE_DNS_1=208.67.222.123
    PIHOLE_DNS_2=208.67.220.123
    QUERY_LOGGING=true
    INSTALL_WEB_SERVER=true
    INSTALL_WEB_INTERFACE=true
    LIGHTTPD_ENABLED=true
    BLOCKING_ENABLED=true
    DHCP_ACTIVE=true
    DHCP_START=192.168.1.201
    DHCP_END=192.168.1.251
    DHCP_ROUTER=192.168.1.254
    DHCP_LEASETIME=24
    PIHOLE_DOMAIN=lan
    DHCP_IPv6=false
    DHCP_rapid_commit=false

*** [ DIAGNOSING ]: Dashboard and block page
[✓] Block page X-Header: X-Pi-hole: A black hole for Internet advertisements.
[✓] Web interface X-Header: X-Pi-hole: The Pi-hole Web interface is working!

*** [ DIAGNOSING ]: Gravity list
-rw-r--r-- 1 root root 2899059 Jan 31 17:25 /etc/pihole/gravity.list
   -----head of gravity.list------
   0.0.0.0
   0.nextyourcontent.com
   0.r.msn.com
   0.start.bz

   -----tail of gravity.list------
   zzz.clickbank.net
   zzzezeroe.fr
   zzzpooeaz-france.com
   zzzrtrcm2.com

*** [ DIAGNOSING ]: contents of /etc/pihole

-rw-r--r-- 1 root root 313 Jan 31 17:21 /etc/pihole/adlists.list
   https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts
   https://mirror1.malwaredomains.com/files/justdomains
   http://sysctl.org/cameleon/hosts
   https://s3.amazonaws.com/lists.disconnect.me/simple_tracking.txt
   https://s3.amazonaws.com/lists.disconnect.me/simple_ad.txt
   https://hosts-file.net/ad_servers.txt

-rw-r--r-- 1 root root 48 Jan 31 17:25 /etc/pihole/local.list
   192.168.1.103 raspberrypi
   192.168.1.103 pi.hole

-rw-r--r-- 1 root root 234 Jan 31 17:24 /etc/pihole/logrotate
   /var/log/pihole.log {
        su root root
        daily
        copytruncate
        rotate 5
        compress
        delaycompress
        notifempty
        nomail
   }
   /var/log/pihole-FTL.log {
        su root root
        weekly
        copytruncate
        rotate 3
        compress
        delaycompress
        notifempty
        nomail
   }

*** [ DIAGNOSING ]: contents of /etc/dnsmasq.d

-rw-r--r-- 1 root root 1526 Feb  1 18:24 /etc/dnsmasq.d/01-pihole.conf
   addn-hosts=/etc/pihole/gravity.list
   addn-hosts=/etc/pihole/black.list
   addn-hosts=/etc/pihole/local.list
   localise-queries
   no-resolv
   cache-size=10000
   log-queries
   log-facility=/var/log/pihole.log
   local-ttl=2
   log-async
   server=208.67.222.123
   server=208.67.220.123
   interface=eth0
   dhcp-name-match=set:hostname-ignore,wpad
   dhcp-name-match=set:hostname-ignore,localhost
   dhcp-ignore-names=tag:hostname-ignore

-rw-r--r-- 1 root root 485 Feb  1 18:24 /etc/dnsmasq.d/02-pihole-dhcp.conf
   dhcp-authoritative
   dhcp-range=192.168.1.201,192.168.1.251,24h
   dhcp-option=option:router,192.168.1.254
   dhcp-leasefile=/etc/pihole/dhcp.leases
   domain=lan

*** [ DIAGNOSING ]: contents of /etc/lighttpd

-rw-r--r-- 1 root root 3499 Jan 31 17:24 /etc/lighttpd/lighttpd.conf
   server.modules = (
        "mod_access",
        "mod_accesslog",
        "mod_auth",
        "mod_expire",
        "mod_compress",
        "mod_redirect",
        "mod_setenv",
        "mod_rewrite"
   )
   server.document-root        = "/var/www/html"
   server.error-handler-404    = "/pihole/index.php"
   server.upload-dirs          = ( "/var/cache/lighttpd/uploads" )
   server.errorlog             = "/var/log/lighttpd/error.log"
   server.pid-file             = "/var/run/lighttpd.pid"
   server.username             = "www-data"
   server.groupname            = "www-data"
   server.port                 = 80
   accesslog.filename          = "/var/log/lighttpd/access.log"
   accesslog.format            = "%{%s}t|%V|%r|%s|%b"
   index-file.names            = ( "index.php", "index.html", "index.lighttpd.html" )
   url.access-deny             = ( "~", ".inc", ".md", ".yml", ".ini" )
   static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" )
   compress.cache-dir          = "/var/cache/lighttpd/compress/"
   compress.filetype           = ( "application/javascript", "text/css", "text/html", "text/plain" )
   mimetype.assign   = ( ".png"  => "image/png",
                         ".jpg"  => "image/jpeg",
                         ".jpeg" => "image/jpeg",
                         ".html" => "text/html",
                         ".css" => "text/css; charset=utf-8",
                         ".js" => "application/javascript",
                         ".json" => "application/json",
                         ".txt"  => "text/plain",
                         ".svg"  => "image/svg+xml" )
   include_shell "/usr/share/lighttpd/use-ipv6.pl " + server.port
   include_shell "find /etc/lighttpd/conf-enabled -name '*.conf' -a ! -name 'letsencrypt.conf' -printf 'include \"%p\"
' 2>/dev/null"
   $HTTP["url"] =~ "^/admin/" {

       setenv.add-response-header = (
           "X-Pi-hole" => "The Pi-hole Web interface is working!",
           "X-Frame-Options" => "DENY"
       )
       $HTTP["url"] =~ ".ttf$" {

           setenv.add-response-header = ( "Access-Control-Allow-Origin" => "*" )
       }
   }
   $HTTP["url"] =~ "^/admin/\.(.*)" {
        url.access-deny = ("")
   }
   include_shell "cat external.conf 2>/dev/null"

*** [ DIAGNOSING ]: contents of /etc/cron.d

-rw-r--r-- 1 root root 1704 Jan 31 17:24 /etc/cron.d/pihole
   11 4   * * 7   root    PATH="$PATH:/usr/local/bin/" pihole updateGravity >/var/log/pihole_updateGravity.log || cat /var/log/pihole_updateGravity.log
   00 00   * * *   root    PATH="$PATH:/usr/local/bin/" pihole flush once quiet
   @reboot root /usr/sbin/logrotate /etc/pihole/logrotate
   */10 *  * * *   root    PATH="$PATH:/usr/local/bin/" pihole updatechecker local
   29 12  * * *   root    PATH="$PATH:/usr/local/bin/" pihole updatechecker remote
   @reboot root    PATH="$PATH:/usr/local/bin/" pihole updatechecker remote reboot

*** [ DIAGNOSING ]: contents of /var/log/lighttpd

-rw-r--r-- 1 www-data www-data 2440 Feb  1 18:52 /var/log/lighttpd/error.log
   2020-01-31 17:23:56: (server.c.1464) server started (lighttpd/1.4.53)
   2020-01-31 17:24:41: (server.c.2059) server stopped by UID = 0 PID = 1
   2020-01-31 17:24:42: (server.c.1464) server started (lighttpd/1.4.53)
   2020-01-31 17:24:42: (server.c.1493) WARNING: unknown config-key: alias.url (ignored)
   2020-01-31 17:33:29: (server.c.2059) server stopped by UID = 0 PID = 1
   2020-01-31 17:33:45: (server.c.1464) server started (lighttpd/1.4.53)
   2020-01-31 17:33:45: (server.c.1493) WARNING: unknown config-key: alias.url (ignored)
   2020-01-31 17:39:09: connect.facebook.com;connect.facebook.net is not a valid domain
   2020-01-31 18:41:28: (server.c.2059) server stopped by UID = 0 PID = 1
   2020-01-31 18:41:45: (server.c.1464) server started (lighttpd/1.4.53)
   2020-01-31 18:41:45: (server.c.1493) WARNING: unknown config-key: alias.url (ignored)
   2020-01-31 18:47:56: (server.c.2059) server stopped by UID = 0 PID = 1
   2020-01-31 18:48:17: (server.c.1464) server started (lighttpd/1.4.53)
   2020-01-31 18:48:17: (server.c.1493) WARNING: unknown config-key: alias.url (ignored)
   2020-01-31 22:47:06: (server.c.2059) server stopped by UID = 0 PID = 1
   2020-01-31 22:47:30: (server.c.1464) server started (lighttpd/1.4.53)
   2020-01-31 22:47:30: (server.c.1493) WARNING: unknown config-key: alias.url (ignored)
   2020-02-01 18:45:30: (mod_fastcgi.c.421) FastCGI-stderr: PHP Notice:  Undefined index: HTTP_HOST in /var/www/html/pihole/index.php on line 10
   2020-02-01 18:45:30: (mod_fastcgi.c.421) FastCGI-stderr: PHP Notice:  Uninitialized string offset: 0 in /var/www/html/admin/scripts/pi-hole/php/queryads.php on line 28
   2020-02-01 18:45:30: (mod_fastcgi.c.421) FastCGI-stderr: PHP Notice:  Undefined index: HTTP_HOST in /var/www/html/pihole/index.php on line 10
   2020-02-01 18:45:30: (mod_fastcgi.c.421) FastCGI-stderr: PHP Notice:  Undefined index: HTTP_HOST in /var/www/html/pihole/index.php on line 10
   2020-02-01 18:45:30: (mod_fastcgi.c.421) FastCGI-stderr: PHP Notice:  Uninitialized string offset: 0 in /var/www/html/admin/scripts/pi-hole/php/queryads.php on line 28
   2020-02-01 18:45:30: (mod_fastcgi.c.421) FastCGI-stderr: PHP Notice:  Undefined index: HTTP_HOST in /var/www/html/pihole/index.php on line 10
   2020-02-01 18:52:14: (server.c.2059) server stopped by UID = 0 PID = 1
   2020-02-01 18:52:36: (server.c.1464) server started (lighttpd/1.4.53)

*** [ DIAGNOSING ]: contents of /var/log

-rw-r--r-- 1 pihole pihole 191441 Feb  1 18:54 /var/log/pihole-FTL.log
   -----head of pihole-FTL.log------
   [2020-02-01 00:01:34.891 733] Resizing "/FTL-queries" from 5505024 to 5701632
   [2020-02-01 00:02:09.315 733] Resizing "/FTL-strings" from 24576 to 28672
   [2020-02-01 00:03:27.470 733] Resizing "/FTL-queries" from 5701632 to 5898240
   [2020-02-01 00:05:23.598 733] Resizing "/FTL-queries" from 5898240 to 6094848
   [2020-02-01 00:07:06.938 733] Resizing "/FTL-queries" from 6094848 to 6291456
   [2020-02-01 00:09:13.117 733] Resizing "/FTL-queries" from 6291456 to 6488064
   [2020-02-01 00:11:19.765 733] Resizing "/FTL-queries" from 6488064 to 6684672
   [2020-02-01 00:13:05.669 733] Resizing "/FTL-queries" from 6684672 to 6881280
   [2020-02-01 00:15:14.553 733] Resizing "/FTL-queries" from 6881280 to 7077888
   [2020-02-01 00:17:21.893 733] Resizing "/FTL-queries" from 7077888 to 7274496
   [2020-02-01 00:19:06.587 733] Resizing "/FTL-queries" from 7274496 to 7471104
   [2020-02-01 00:21:39.582 733] Resizing "/FTL-queries" from 7471104 to 7667712
   [2020-02-01 00:23:24.457 733] Resizing "/FTL-queries" from 7667712 to 7864320
   [2020-02-01 00:25:43.763 733] Resizing "/FTL-queries" from 7864320 to 8060928
   [2020-02-01 00:27:41.091 733] Resizing "/FTL-queries" from 8060928 to 8257536
   [2020-02-01 00:29:26.766 733] Resizing "/FTL-queries" from 8257536 to 8454144
   [2020-02-01 00:31:34.617 733] Resizing "/FTL-queries" from 8454144 to 8650752
   [2020-02-01 00:33:41.196 733] Resizing "/FTL-queries" from 8650752 to 8847360
   [2020-02-01 00:35:25.516 733] Resizing "/FTL-queries" from 8847360 to 9043968
   [2020-02-01 00:37:21.201 733] Resizing "/FTL-queries" from 9043968 to 9240576
   [2020-02-01 00:39:29.979 733] Resizing "/FTL-queries" from 9240576 to 9437184
   [2020-02-01 00:41:13.929 733] Resizing "/FTL-queries" from 9437184 to 9633792
   [2020-02-01 00:43:10.750 733] Resizing "/FTL-queries" from 9633792 to 9830400
   [2020-02-01 00:44:54.223 733] Resizing "/FTL-queries" from 9830400 to 10027008
   [2020-02-01 00:46:49.969 733] Resizing "/FTL-queries" from 10027008 to 10223616
   [2020-02-01 00:49:00.946 733] Resizing "/FTL-queries" from 10223616 to 10420224
   [2020-02-01 00:50:55.433 733] Resizing "/FTL-queries" from 10420224 to 10616832
   [2020-02-01 00:53:02.229 733] Resizing "/FTL-queries" from 10616832 to 10813440
   [2020-02-01 00:54:46.891 733] Resizing "/FTL-queries" from 10813440 to 11010048
   [2020-02-01 00:57:06.898 733] Resizing "/FTL-queries" from 11010048 to 11206656
   [2020-02-01 00:59:03.340 733] Resizing "/FTL-queries" from 11206656 to 11403264
   [2020-02-01 01:00:57.322 733] Resizing "/FTL-queries" from 11403264 to 11599872
   [2020-02-01 01:02:52.824 733] Resizing "/FTL-queries" from 11599872 to 11796480
   [2020-02-01 01:04:39.947 733] Resizing "/FTL-queries" from 11796480 to 11993088
   [2020-02-01 01:06:45.551 733] Resizing "/FTL-queries" from 11993088 to 12189696

   -----tail of pihole-FTL.log------
   [2020-02-01 18:54:09.216 742] Resizing "/FTL-queries" from 107151360 to 107347968
   [2020-02-01 18:54:09.377 742] Resizing "/FTL-queries" from 107347968 to 107544576
   [2020-02-01 18:54:09.542 742] Resizing "/FTL-queries" from 107544576 to 107741184
   [2020-02-01 18:54:09.702 742] Resizing "/FTL-queries" from 107741184 to 107937792
   [2020-02-01 18:54:09.863 742] Resizing "/FTL-queries" from 107937792 to 108134400
   [2020-02-01 18:54:10.028 742] Resizing "/FTL-queries" from 108134400 to 108331008
   [2020-02-01 18:54:10.197 742] Resizing "/FTL-queries" from 108331008 to 108527616
   [2020-02-01 18:54:10.350 742] Resizing "/FTL-queries" from 108527616 to 108724224
   [2020-02-01 18:54:10.504 742] Resizing "/FTL-queries" from 108724224 to 108920832
   [2020-02-01 18:54:10.659 742] Resizing "/FTL-queries" from 108920832 to 109117440
   [2020-02-01 18:54:10.817 742] Resizing "/FTL-queries" from 109117440 to 109314048
   [2020-02-01 18:54:10.988 742] Resizing "/FTL-queries" from 109314048 to 109510656
   [2020-02-01 18:54:11.155 742] Resizing "/FTL-queries" from 109510656 to 109707264
   [2020-02-01 18:54:11.317 742] Resizing "/FTL-queries" from 109707264 to 109903872
   [2020-02-01 18:54:11.481 742] Resizing "/FTL-queries" from 109903872 to 110100480
   [2020-02-01 18:54:11.641 742] Resizing "/FTL-queries" from 110100480 to 110297088
   [2020-02-01 18:54:11.801 742] Resizing "/FTL-queries" from 110297088 to 110493696
   [2020-02-01 18:54:11.964 742] Resizing "/FTL-queries" from 110493696 to 110690304
   [2020-02-01 18:54:12.130 742] Resizing "/FTL-queries" from 110690304 to 110886912
   [2020-02-01 18:54:12.292 742] Resizing "/FTL-queries" from 110886912 to 111083520
   [2020-02-01 18:54:12.451 742] Resizing "/FTL-queries" from 111083520 to 111280128
   [2020-02-01 18:54:12.611 742] Resizing "/FTL-queries" from 111280128 to 111476736
   [2020-02-01 18:54:12.770 742] Resizing "/FTL-queries" from 111476736 to 111673344
   [2020-02-01 18:54:12.930 742] Resizing "/FTL-queries" from 111673344 to 111869952
   [2020-02-01 18:54:13.090 742] Resizing "/FTL-queries" from 111869952 to 112066560
   [2020-02-01 18:54:13.158 742] Imported 2332233 queries from the long-term database
   [2020-02-01 18:54:13.160 742]  -> Total DNS queries: 2332233
   [2020-02-01 18:54:13.160 742]  -> Cached DNS queries: 2320769
   [2020-02-01 18:54:13.160 742]  -> Forwarded DNS queries: 10170
   [2020-02-01 18:54:13.160 742]  -> Exactly blocked DNS queries: 1294
   [2020-02-01 18:54:13.160 742]  -> Unknown DNS queries: 0
   [2020-02-01 18:54:13.160 742]  -> Unique domains: 1304
   [2020-02-01 18:54:13.160 742]  -> Unique clients: 16
   [2020-02-01 18:54:13.161 742]  -> Known forward destinations: 2
   [2020-02-01 18:54:13.161 742] Successfully accessed setupVars.conf

*** [ DIAGNOSING ]: contents of /dev/shm
-rw------- 1 pihole pihole 323584 Feb  1 18:52 /dev/shm/FTL-clients
-rw------- 1 pihole pihole 108 Feb  1 18:52 /dev/shm/FTL-counters
-rw------- 1 pihole pihole 65536 Feb  1 18:54 /dev/shm/FTL-domains
-rw------- 1 pihole pihole 12288 Feb  1 18:52 /dev/shm/FTL-forwarded
-rw------- 1 pihole pihole 28 Feb  1 18:52 /dev/shm/FTL-lock
-rw------- 1 pihole pihole 53248 Feb  1 18:52 /dev/shm/FTL-overTime
-rw------- 1 pihole pihole 112066560 Feb  1 18:54 /dev/shm/FTL-queries
-rw------- 1 pihole pihole 12 Feb  1 18:52 /dev/shm/FTL-settings
-rw------- 1 pihole pihole 32768 Feb  1 18:54 /dev/shm/FTL-strings

*** [ DIAGNOSING ]: Locale
    LANG=en_GB.UTF-8

*** [ DIAGNOSING ]: Pi-hole log
-rw-r--r-- 1 pihole pihole 334621228 Feb  1 18:52 /var/log/pihole.log
   -----head of pihole.log------
   Feb  1 00:00:03 dnsmasq[733]: query[PTR] 212.1.168.192.in-addr.arpa from 192.168.1.100
   Feb  1 00:00:03 dnsmasq[733]: cached 192.168.1.212 is NXDOMAIN
   Feb  1 00:00:03 dnsmasq[733]: query[PTR] 226.1.168.192.in-addr.arpa from 192.168.1.100
   Feb  1 00:00:03 dnsmasq[733]: cached 192.168.1.226 is NXDOMAIN
   Feb  1 00:00:03 dnsmasq[733]: query[PTR] 121.1.168.192.in-addr.arpa from 192.168.1.100
   Feb  1 00:00:03 dnsmasq[733]: DHCP 192.168.1.121 is Lamp_kast-2664.lan
   Feb  1 00:00:03 dnsmasq[733]: query[PTR] 253.1.168.192.in-addr.arpa from 192.168.1.100
   Feb  1 00:00:03 dnsmasq[733]: cached 192.168.1.253 is NXDOMAIN
   Feb  1 00:00:03 dnsmasq[733]: query[PTR] 113.1.168.192.in-addr.arpa from 192.168.1.100
   Feb  1 00:00:03 dnsmasq[733]: DHCP 192.168.1.113 is services.lan
   Feb  1 00:00:03 dnsmasq[733]: query[PTR] 231.1.168.192.in-addr.arpa from 192.168.1.100
   Feb  1 00:00:03 dnsmasq[733]: cached 192.168.1.231 is NXDOMAIN
   Feb  1 00:00:03 dnsmasq[733]: query[PTR] 122.1.168.192.in-addr.arpa from 192.168.1.100
   Feb  1 00:00:03 dnsmasq[733]: DHCP 192.168.1.122 is Lamp_2.lan
   Feb  1 00:00:03 dnsmasq[733]: query[PTR] 254.1.168.192.in-addr.arpa from 192.168.1.100
   Feb  1 00:00:03 dnsmasq[733]: cached 192.168.1.254 is NXDOMAIN
   Feb  1 00:00:03 dnsmasq[733]: query[PTR] 216.1.168.192.in-addr.arpa from 192.168.1.100
   Feb  1 00:00:03 dnsmasq[733]: cached 192.168.1.216 is NXDOMAIN
   Feb  1 00:00:03 dnsmasq[733]: query[PTR] 127.1.168.192.in-addr.arpa from 192.168.1.100
   Feb  1 00:00:03 dnsmasq[733]: cached 192.168.1.127 is NXDOMAIN

Make sure no rogue config files not belonging to Pi-hole exists that messes up how Pi-hole is listening on ports 53 UDP/TCP:

sudo grep -v '^#\|^$' -R /etc/dnsmasq.* | sort

Found it my self

04-pihole-static-dhcp.conf last entry was
dhcp-host=B8:27:EB:3D:A1:65,192.168.1.110,Meterkastdhcp-host=24:62:AB:4C:63:E4,192.168.1.228,LAMPMini-0996

instead of
dhcp-host=B8:27:EB:3D:A1:65,192.168.1.110,Meterkast
dhcp-host=24:62:AB:4C:63:E4,192.168.1.228,LAMPMini-0996

I came to this when I did
sudo service pihole-FTL status
where is say it got an error in 04-pihole-static-dhcp.conf

FYI I did not mutate this file my self.

Call can be closed

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You may continue to have problems with this volume of queries. The information for all these queries has to be read from the long term database and this will consume resources.

   Feb  1 00:00:03 dnsmasq[733]: query[PTR] 212.1.168.192.in-addr.arpa from 192.168.1.100
   Feb  1 00:00:03 dnsmasq[733]: cached 192.168.1.212 is NXDOMAIN

If you map the IP of the device at 192.168.1.212 to a domain name in /etc/hosts on the Pi, then this domain name will be answered and the client may be satisfied and stop making the request. What is the output of these commands from the Pi terminal:

echo ">top-clients" | nc localhost 4711

echo ">top-domains" | nc localhost 4711

echo ">forward-dest" | nc localhost 4711

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