Trouble setting up IPv6 with Pi-Hole

This is actually a continuation of this thread. I was in the middle of my exam phase when I opened it and was too stressed out to try to solve the problem. Well, nothing has changed really.

When I type ip addr this is what I see

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:e0:4c:36:02:67 brd ff:ff:ff:ff:ff:ff
    inet 192.168.184.34/24 brd 192.168.184.255 scope global noprefixroute eth0
       valid_lft forever preferred_lft forever
    inet6 2a04:4540:7100:2800:20a:adeb:b82a:a992/64 scope global dynamic mngtmpaddr noprefixroute 
       valid_lft 7188sec preferred_lft 3588sec
    inet6 fe80::f9d8:a73b:2fb6:8839/128 scope link 
       valid_lft forever preferred_lft forever
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
    link/ether b8:27:eb:ed:21:70 brd ff:ff:ff:ff:ff:ff

I am trying to enter the Link Local adress in my router, but it doesn't work. It only works with the non-static address, which is of course not practical. What do I do now?

It is also weird that Pi-Hole shows me a different IPv6 address, which also doesn't work

image

Okay, I tried reinstalling Pi-Hole and it seems to pick the dynamic IPv6 address as the one for blocking ads. This address is saved in the settings and stays the same, even when the address has changed after some time. So Pi-Hole doesn not know the difference between a static or dynamic IPv6 address.