DNS resolver crashes

I am still getting DNS resolver crashes even when not using cloudflare.

https://tricorder.pi-hole.net/4qcdcccgl5

Are there any errors in
/var/log/pihole-FTL.log?

Yes.

[2020-07-04 03:03:16.823 585] Resizing "/FTL-dns-cache" from 57344 to 61440
[2020-07-04 03:23:16.822 585] Resizing "/FTL-strings" from 106496 to 110592
[2020-07-04 06:13:16.930 585] !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[2020-07-04 06:13:16.930 585] ----------------------------> FTL crashed! <----------------------------
[2020-07-04 06:13:16.930 585] !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[2020-07-04 06:13:16.930 585] Please report a bug at https://github.com/pi-hole/FTL/issues
[2020-07-04 06:13:16.931 585] and include in your report already the following details:
[2020-07-04 06:13:16.931 585] FTL has been running for 343762 seconds
[2020-07-04 06:13:16.931 585] FTL branch: master
[2020-07-04 06:13:16.931 585] FTL version: v5.0
[2020-07-04 06:13:16.931 585] FTL commit: 3d7c095
[2020-07-04 06:13:16.931 585] FTL date: 2020-05-10 18:58:38 +0100
[2020-07-04 06:13:16.931 585] FTL user: started as pihole, ended as pihole
[2020-07-04 06:13:16.931 585] Compiled for armhf (compiled on CI) using arm-linux-gnueabihf-gcc (Debian 6.3.0-18) 6.3.0 20170516
[2020-07-04 06:13:16.931 585] Received signal: Segmentation fault
[2020-07-04 06:13:16.932 585] at address: 0x7a66652d
[2020-07-04 06:13:16.932 585] with code: SEGV_MAPERR (Address not mapped to object)
[2020-07-04 06:13:16.932 585] Backtrace:
[2020-07-04 06:13:16.933 585] B[0000]: 0x4c58e4, /usr/bin/pihole-FTL(+0x238e4) [0x4c58e4]
[2020-07-04 06:13:16.933 585] B[0001]: 0x76da0130, /lib/arm-linux-gnueabihf/libc.so.6(__default_rt_sa_restorer+0) [0x76da0130]
[2020-07-04 06:13:16.933 585] B[0002]: 0x4e99da, /usr/bin/pihole-FTL(+0x479da) [0x4e99da]
[2020-07-04 06:13:16.933 585] B[0003]: 0x4eafcc, /usr/bin/pihole-FTL(main_dnsmasq+0xc07) [0x4eafcc]
[2020-07-04 06:13:16.933 585] B[0004]: 0x4bbda8, /usr/bin/pihole-FTL(main+0xa7) [0x4bbda8]
[2020-07-04 06:13:16.933 585] B[0005]: 0x76d8a718, /lib/arm-linux-gnueabihf/libc.so.6(__libc_start_main+0x10c) [0x76d8a718]
[2020-07-04 06:13:16.933 585] ------ Listing content of directory /dev/shm ------
[2020-07-04 06:13:16.933 585] File Mode User:Group Filesize Filename
[2020-07-04 06:13:16.934 585] rwxrwxrwx root:root 260 .
[2020-07-04 06:13:16.934 585] rwxr-xr-x root:root 4K ..
[2020-07-04 06:13:16.935 585] rw------- pihole:pihole 4K FTL-per-client-regex
[2020-07-04 06:13:16.935 585] rw------- pihole:pihole 61K FTL-dns-cache
[2020-07-04 06:13:16.935 585] rw------- pihole:pihole 29K FTL-overTime
[2020-07-04 06:13:16.936 585] rw------- pihole:pihole 1M FTL-queries
[2020-07-04 06:13:16.936 585] rw------- pihole:pihole 20K FTL-upstreams
[2020-07-04 06:13:16.936 585] rw------- pihole:pihole 643K FTL-clients
[2020-07-04 06:13:16.937 585] rw------- pihole:pihole 66K FTL-domains
[2020-07-04 06:13:16.937 585] rw------- pihole:pihole 111K FTL-strings
[2020-07-04 06:13:16.937 585] rw------- pihole:pihole 12 FTL-settings
[2020-07-04 06:13:16.938 585] rw------- pihole:pihole 124 FTL-counters
[2020-07-04 06:13:16.938 585] rw------- pihole:pihole 28 FTL-lock
[2020-07-04 06:13:16.938 585] ---------------------------------------------------
[2020-07-04 06:13:16.938 585] Thank you for helping us to improve our FTL engine!
[2020-07-04 06:13:16.938 585] FTL terminated!
[2020-07-04 06:14:10.070 5988] Using log file /var/log/pihole-FTL.log
[2020-07-04 06:14:10.070 5988] ########## FTL started! ##########
[2020-07-04 06:14:10.070 5988] FTL branch: master
[2020-07-04 06:14:10.070 5988] FTL version: v5.0
[2020-07-04 06:14:10.071 5988] FTL commit: 3d7c095
[2020-07-04 06:14:10.071 5988] FTL date: 2020-05-10 18:58:38 +0100
[2020-07-04 06:14:10.071 5988] FTL user: pihole
[2020-07-04 06:14:10.071 5988] Compiled for armhf (compiled on CI) using arm-linux-gnueabihf-gcc (Debian 6.3.0-18) 6.3.0 20170516
[2020-07-04 06:14:10.071 5988] Starting config file parsing (/etc/pihole/pihole-FTL.conf)
[2020-07-04 06:14:10.071 5988] SOCKET_LISTENING: only local
[2020-07-04 06:14:10.071 5988] AAAA_QUERY_ANALYSIS: Show AAAA queries
[2020-07-04 06:14:10.071 5988] MAXDBDAYS: max age for stored queries is 365 days
[2020-07-04 06:14:10.071 5988] RESOLVE_IPV6: Resolve IPv6 addresses
[2020-07-04 06:14:10.072 5988] RESOLVE_IPV4: Resolve IPv4 addresses
[2020-07-04 06:14:10.072 5988] DBINTERVAL: saving to DB file every minute
[2020-07-04 06:14:10.072 5988] DBFILE: Using /etc/pihole/pihole-FTL.db
[2020-07-04 06:14:10.072 5988] MAXLOGAGE: Importing up to 24.0 hours of log data
[2020-07-04 06:14:10.072 5988] PRIVACYLEVEL: Set to 0
[2020-07-04 06:14:10.072 5988] IGNORE_LOCALHOST: Show queries from localhost
[2020-07-04 06:14:10.072 5988] BLOCKINGMODE: Null IPs for blocked domains
[2020-07-04 06:14:10.072 5988] ANALYZE_ONLY_A_AND_AAAA: Disabled. Analyzing all queries
[2020-07-04 06:14:10.072 5988] DBIMPORT: Importing history from database
[2020-07-04 06:14:10.072 5988] PIDFILE: Using /var/run/pihole-FTL.pid
[2020-07-04 06:14:10.073 5988] PORTFILE: Using /var/run/pihole-FTL.port
[2020-07-04 06:14:10.073 5988] SOCKETFILE: Using /var/run/pihole/FTL.sock
[2020-07-04 06:14:10.073 5988] SETUPVARSFILE: Using /etc/pihole/setupVars.conf
[2020-07-04 06:14:10.073 5988] MACVENDORDB: Using /etc/pihole/macvendor.db
[2020-07-04 06:14:10.073 5988] GRAVITYDB: Using /etc/pihole/gravity.db
[2020-07-04 06:14:10.073 5988] PARSE_ARP_CACHE: Active
[2020-07-04 06:14:10.073 5988] CNAME_DEEP_INSPECT: Active
[2020-07-04 06:14:10.073 5988] DELAY_STARTUP: No delay requested.
[2020-07-04 06:14:10.073 5988] BLOCK_ESNI: Enabled, blocking _esni.{blocked domain}
[2020-07-04 06:14:10.074 5988] Finished config file parsing
[2020-07-04 06:14:10.077 5988] Database version is 5
[2020-07-04 06:14:10.077 5988] Database successfully initialized
[2020-07-04 06:14:10.078 5988] New upstream server: 2001:4860:4860::8888 (0/1024)
[2020-07-04 06:14:10.080 5988] New upstream server: 2001:4860:4860::8844 (1/1024)
[2020-07-04 06:14:10.080 5988] New upstream server: 8.8.4.4 (2/1024)
[2020-07-04 06:14:10.087 5988] Resizing "/FTL-strings" from 4096 to 8192
[2020-07-04 06:14:10.108 5988] Resizing "/FTL-strings" from 8192 to 12288
[2020-07-04 06:14:10.111 5988] New upstream server: 8.8.8.8 (3/1024)
[2020-07-04 06:14:10.142 5988] Resizing "/FTL-strings" from 12288 to 16384
[2020-07-04 06:14:10.195 5988] Resizing "/FTL-strings" from 16384 to 20480
[2020-07-04 06:14:10.214 5988] Resizing "/FTL-queries" from 229376 to 458752
[2020-07-04 06:14:10.288 5988] Resizing "/FTL-strings" from 20480 to 24576
[2020-07-04 06:14:10.368 5988] Resizing "/FTL-strings" from 24576 to 28672
[2020-07-04 06:14:10.399 5988] Resizing "/FTL-queries" from 458752 to 688128
[2020-07-04 06:14:10.484 5988] Resizing "/FTL-strings" from 28672 to 32768
[2020-07-04 06:14:10.574 5988] Resizing "/FTL-queries" from 688128 to 917504
[2020-07-04 06:14:10.632 5988] Resizing "/FTL-strings" from 32768 to 36864
[2020-07-04 06:14:10.721 5988] Resizing "/FTL-queries" from 917504 to 1146880
[2020-07-04 06:14:10.749 5988] Imported 16895 queries from the long-term database
[2020-07-04 06:14:10.751 5988] -> Total DNS queries: 16895
[2020-07-04 06:14:10.751 5988] -> Cached DNS queries: 2703
[2020-07-04 06:14:10.751 5988] -> Forwarded DNS queries: 10790
[2020-07-04 06:14:10.751 5988] -> Blocked DNS queries: 3402
[2020-07-04 06:14:10.751 5988] -> Unknown DNS queries: 0
[2020-07-04 06:14:10.751 5988] -> Unique domains: 1274
[2020-07-04 06:14:10.751 5988] -> Unique clients: 9
[2020-07-04 06:14:10.752 5988] -> Known forward destinations: 4
[2020-07-04 06:14:10.752 5988] Successfully accessed setupVars.conf
[2020-07-04 06:14:10.760 5990] PID of FTL process: 5990
[2020-07-04 06:14:10.761 5990] Listening on port 4711 for incoming IPv4 telnet connections
[2020-07-04 06:14:10.762 5990] Listening on port 4711 for incoming IPv6 telnet connections
[2020-07-04 06:14:10.762 5990] Listening on Unix socket
[2020-07-04 06:14:10.764 5990] Reloading DNS cache
[2020-07-04 06:14:10.765 5990] Blocking status is enabled
[2020-07-04 06:14:10.772 5990] INFO: No regex blacklist entries found
[2020-07-04 06:14:10.773 5990] INFO: No regex whitelist entries found
[2020-07-04 06:14:10.783 5990] Compiled 0 whitelist and 0 blacklist regex filters in 11.4 msec
[2020-07-04 06:23:16.822 5990] Resizing "/FTL-strings" from 36864 to 40960
[2020-07-04 06:39:30.429 5990] Resizing "/FTL-dns-cache" from 4096 to 8192
[2020-07-04 07:35:51.102 5990] Resizing "/FTL-dns-cache" from 8192 to 12288
[2020-07-04 07:43:16.854 8225] Note: FTL forked to handle TCP requests
[2020-07-04 08:01:08.423 5990] Resizing "/FTL-strings" from 40960 to 45056
[2020-07-04 08:54:16.676 9839] Note: FTL forked to handle TCP requests
[2020-07-04 09:14:13.290 10297] Note: FTL forked to handle TCP requests
[2020-07-04 09:27:11.206 5990] Resizing "/FTL-dns-cache" from 12288 to 16384
[2020-07-04 10:04:13.438 5990] !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[2020-07-04 10:04:13.439 5990] ----------------------------> FTL crashed! <----------------------------
[2020-07-04 10:04:13.439 5990] !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[2020-07-04 10:04:13.439 5990] Please report a bug at https://github.com/pi-hole/FTL/issues
[2020-07-04 10:04:13.439 5990] and include in your report already the following details:
[2020-07-04 10:04:13.439 5990] FTL has been running for 13803 seconds
[2020-07-04 10:04:13.439 5990] FTL branch: master
[2020-07-04 10:04:13.439 5990] FTL version: v5.0
[2020-07-04 10:04:13.439 5990] FTL commit: 3d7c095
[2020-07-04 10:04:13.439 5990] FTL date: 2020-05-10 18:58:38 +0100
[2020-07-04 10:04:13.439 5990] FTL user: started as pihole, ended as pihole
[2020-07-04 10:04:13.439 5990] Compiled for armhf (compiled on CI) using arm-linux-gnueabihf-gcc (Debian 6.3.0-18) 6.3.0 20170516
[2020-07-04 10:04:13.440 5990] Received signal: Segmentation fault
[2020-07-04 10:04:13.440 5990] at address: 0x7a66652d
[2020-07-04 10:04:13.440 5990] with code: SEGV_MAPERR (Address not mapped to object)
[2020-07-04 10:04:13.440 5990] Backtrace:
[2020-07-04 10:04:13.441 5990] B[0000]: 0x4538e4, /usr/bin/pihole-FTL(+0x238e4) [0x4538e4]
[2020-07-04 10:04:13.441 5990] B[0001]: 0x76d1e130, /lib/arm-linux-gnueabihf/libc.so.6(__default_rt_sa_restorer+0) [0x76d1e130]
[2020-07-04 10:04:13.441 5990] B[0002]: 0x4779da, /usr/bin/pihole-FTL(+0x479da) [0x4779da]
[2020-07-04 10:04:13.441 5990] B[0003]: 0x478fcc, /usr/bin/pihole-FTL(main_dnsmasq+0xc07) [0x478fcc]
[2020-07-04 10:04:13.441 5990] B[0004]: 0x449da8, /usr/bin/pihole-FTL(main+0xa7) [0x449da8]
[2020-07-04 10:04:13.441 5990] B[0005]: 0x76d08718, /lib/arm-linux-gnueabihf/libc.so.6(__libc_start_main+0x10c) [0x76d08718]
[2020-07-04 10:04:13.441 5990] ------ Listing content of directory /dev/shm ------
[2020-07-04 10:04:13.441 5990] File Mode User:Group Filesize Filename
[2020-07-04 10:04:13.442 5990] rwxrwxrwx root:root 260 .
[2020-07-04 10:04:13.442 5990] rwxr-xr-x root:root 4K ..
[2020-07-04 10:04:13.442 5990] rw------- pihole:pihole 4K FTL-per-client-regex
[2020-07-04 10:04:13.442 5990] rw------- pihole:pihole 16K FTL-dns-cache
[2020-07-04 10:04:13.443 5990] rw------- pihole:pihole 29K FTL-overTime
[2020-07-04 10:04:13.443 5990] rw------- pihole:pihole 1M FTL-queries
[2020-07-04 10:04:13.443 5990] rw------- pihole:pihole 20K FTL-upstreams
[2020-07-04 10:04:13.444 5990] rw------- pihole:pihole 643K FTL-clients
[2020-07-04 10:04:13.444 5990] rw------- pihole:pihole 66K FTL-domains
[2020-07-04 10:04:13.444 5990] rw------- pihole:pihole 45K FTL-strings
[2020-07-04 10:04:13.445 5990] rw------- pihole:pihole 12 FTL-settings
[2020-07-04 10:04:13.445 5990] rw------- pihole:pihole 124 FTL-counters
[2020-07-04 10:04:13.446 5990] rw------- pihole:pihole 28 FTL-lock
[2020-07-04 10:04:13.446 5990] ---------------------------------------------------
[2020-07-04 10:04:13.446 5990] Thank you for helping us to improve our FTL engine!
[2020-07-04 10:04:13.446 5990] FTL terminated!
[2020-07-04 14:30:12.305 19109] Using log file /var/log/pihole-FTL.log
[2020-07-04 14:30:12.305 19109] ########## FTL started! ##########
[2020-07-04 14:30:12.309 19109] FTL branch: master
[2020-07-04 14:30:12.309 19109] FTL version: v5.0
[2020-07-04 14:30:12.309 19109] FTL commit: 3d7c095
[2020-07-04 14:30:12.310 19109] FTL date: 2020-05-10 18:58:38 +0100
[2020-07-04 14:30:12.310 19109] FTL user: pihole
[2020-07-04 14:30:12.310 19109] Compiled for armhf (compiled on CI) using arm-linux-gnueabihf-gcc (Debian 6.3.0-18) 6.3.0 20170516
[2020-07-04 14:30:12.310 19109] Starting config file parsing (/etc/pihole/pihole-FTL.conf)
[2020-07-04 14:30:12.310 19109] SOCKET_LISTENING: only local
[2020-07-04 14:30:12.310 19109] AAAA_QUERY_ANALYSIS: Show AAAA queries
[2020-07-04 14:30:12.310 19109] MAXDBDAYS: max age for stored queries is 365 days
[2020-07-04 14:30:12.310 19109] RESOLVE_IPV6: Resolve IPv6 addresses
[2020-07-04 14:30:12.310 19109] RESOLVE_IPV4: Resolve IPv4 addresses
[2020-07-04 14:30:12.311 19109] DBINTERVAL: saving to DB file every minute
[2020-07-04 14:30:12.311 19109] DBFILE: Using /etc/pihole/pihole-FTL.db
[2020-07-04 14:30:12.311 19109] MAXLOGAGE: Importing up to 24.0 hours of log data
[2020-07-04 14:30:12.311 19109] PRIVACYLEVEL: Set to 0
[2020-07-04 14:30:12.311 19109] IGNORE_LOCALHOST: Show queries from localhost
[2020-07-04 14:30:12.311 19109] BLOCKINGMODE: Null IPs for blocked domains
[2020-07-04 14:30:12.311 19109] ANALYZE_ONLY_A_AND_AAAA: Disabled. Analyzing all queries
[2020-07-04 14:30:12.311 19109] DBIMPORT: Importing history from database
[2020-07-04 14:30:12.311 19109] PIDFILE: Using /var/run/pihole-FTL.pid
[2020-07-04 14:30:12.311 19109] PORTFILE: Using /var/run/pihole-FTL.port
[2020-07-04 14:30:12.311 19109] SOCKETFILE: Using /var/run/pihole/FTL.sock
[2020-07-04 14:30:12.312 19109] SETUPVARSFILE: Using /etc/pihole/setupVars.conf
[2020-07-04 14:30:12.312 19109] MACVENDORDB: Using /etc/pihole/macvendor.db
[2020-07-04 14:30:12.312 19109] GRAVITYDB: Using /etc/pihole/gravity.db
[2020-07-04 14:30:12.312 19109] PARSE_ARP_CACHE: Active
[2020-07-04 14:30:12.312 19109] CNAME_DEEP_INSPECT: Active
[2020-07-04 14:30:12.312 19109] DELAY_STARTUP: No delay requested.
[2020-07-04 14:30:12.312 19109] BLOCK_ESNI: Enabled, blocking _esni.{blocked domain}
[2020-07-04 14:30:12.312 19109] Finished config file parsing
[2020-07-04 14:30:12.315 19109] Database version is 5
[2020-07-04 14:30:12.316 19109] Database successfully initialized
[2020-07-04 14:30:12.317 19109] New upstream server: 2001:4860:4860::8844 (0/1024)
[2020-07-04 14:30:12.319 19109] New upstream server: 2001:4860:4860::8888 (1/1024)
[2020-07-04 14:30:12.325 19109] Resizing "/FTL-strings" from 4096 to 8192
[2020-07-04 14:30:12.337 19109] New upstream server: 8.8.8.8 (2/1024)
[2020-07-04 14:30:12.344 19109] Resizing "/FTL-strings" from 8192 to 12288
[2020-07-04 14:30:12.375 19109] New upstream server: 8.8.4.4 (3/1024)
[2020-07-04 14:30:12.381 19109] Resizing "/FTL-strings" from 12288 to 16384
[2020-07-04 14:30:12.434 19109] Resizing "/FTL-queries" from 229376 to 458752
[2020-07-04 14:30:12.459 19109] Resizing "/FTL-strings" from 16384 to 20480
[2020-07-04 14:30:12.553 19109] Resizing "/FTL-strings" from 20480 to 24576
[2020-07-04 14:30:12.557 19109] Resizing "/FTL-queries" from 458752 to 688128
[2020-07-04 14:30:12.637 19109] Resizing "/FTL-strings" from 24576 to 28672
[2020-07-04 14:30:12.792 19109] Resizing "/FTL-strings" from 28672 to 32768
[2020-07-04 14:30:12.819 19109] Resizing "/FTL-queries" from 688128 to 917504
[2020-07-04 14:30:12.846 19109] Imported 12881 queries from the long-term database
[2020-07-04 14:30:12.847 19109] -> Total DNS queries: 12881
[2020-07-04 14:30:12.847 19109] -> Cached DNS queries: 1976
[2020-07-04 14:30:12.847 19109] -> Forwarded DNS queries: 7939
[2020-07-04 14:30:12.847 19109] -> Blocked DNS queries: 2966
[2020-07-04 14:30:12.847 19109] -> Unknown DNS queries: 0
[2020-07-04 14:30:12.847 19109] -> Unique domains: 1115
[2020-07-04 14:30:12.847 19109] -> Unique clients: 8
[2020-07-04 14:30:12.848 19109] -> Known forward destinations: 4
[2020-07-04 14:30:12.848 19109] Successfully accessed setupVars.conf
[2020-07-04 14:30:12.856 19111] PID of FTL process: 19111
[2020-07-04 14:30:12.856 19111] Listening on port 4711 for incoming IPv4 telnet connections
[2020-07-04 14:30:12.857 19111] Listening on port 4711 for incoming IPv6 telnet connections
[2020-07-04 14:30:12.858 19111] Listening on Unix socket
[2020-07-04 14:30:12.860 19111] Reloading DNS cache
[2020-07-04 14:30:12.860 19111] Blocking status is enabled
[2020-07-04 14:30:12.871 19111] INFO: No regex blacklist entries found
[2020-07-04 14:30:12.871 19111] INFO: No regex whitelist entries found
[2020-07-04 14:30:12.880 19111] Compiled 0 whitelist and 0 blacklist regex filters in 9.8 msec
[2020-07-04 14:38:38.250 19111] Resizing "/FTL-strings" from 32768 to 36864
[2020-07-04 14:50:56.802 19111] Resizing "/FTL-dns-cache" from 4096 to 8192
[2020-07-04 15:12:14.153 19111] Resizing "/FTL-strings" from 36864 to 40960
[2020-07-04 15:15:28.530 19111] Resizing "/FTL-dns-cache" from 8192 to 12288
[2020-07-04 15:24:13.307 20535] Note: FTL forked to handle TCP requests
[2020-07-04 15:34:13.291 20747] Note: FTL forked to handle TCP requests
[2020-07-04 15:44:13.305 20999] Note: FTL forked to handle TCP requests

Thanks for the report. It looks like it's very similar to:

https://github.com/pi-hole/FTL/issues/816

Could you post the lines above

 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[2020-07-04 06:13:16.930 585] ----------------------------> FTL crashed! <----------------------------

There are no lines above

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[2020-07-04 06:13:16.930 585] ----------------------------> FTL crashed!
 <----------------------------

Next time it does this I will look and post again.

Thanks.

Since the Pi-hole 5.1.1, Web I/F 5.1 and FTL 5.1 upgrade, I am getting a spinner on Clinet activity over last 24 hours, Query Types, Queries answered by windows 100% of time.
Clearing caches, restarting DNS resolver, restarting RPi running pihole do not fix it.

https://tricorder.pi-hole.net/b3z9pj30yi

This has almost always been cleared by a browser cache clear. Have you tried a different browser and/or different client? If so, is the display the same in all cases?

Thanks jfb. I reinstalled pihole just before reading your post but did the browser cache clear anyhow and it has now come good.