Traffic not flowing as intended

I just set up my AdGuard Home in my HA (first time ever), and I can’t get it to work properly.

I’ve set up my HA on 192.168.15.3
Installed everything basic , and then installing AdGuard Home
Made sure I got it to listen to the correct IP (192.168.15.3)
(note : For some reason, it also lists 172.30.32.1 which I have no clue where it comes from)
HA Network settings is IP 192.168.15.3/24 , GW 192.168.15.1 (my router) and DNS is 192.168.15.3

For testing I’m only changing my mobile to use 192.168.15.3 as DNS to make sure before I start messing with all of my devices.

When I connect to my WiFi and open some pages, I get the DNS queries in AdGuard Home, but no blocks. And it basically only works on the first few pages I open.
Then it stops making the queries (atleast nothing comes up in the dashboard), but everything is working fine in the phone.

If I then disconnect from the WiFi on my mobile, and then connects again, it acctually shows a few more queries again.

This is 100% some miss-configuration from my side, but I can’t figure it out. Thankful for any help.