Android devices lose Internet access after a few minutes

[Some_Duder]

Expected Behaviour:

Android devices should be able to access the Internet.

Actual Behaviour:

My Android devices (older Android 9 phone and an Android 11 tablet) lose access to the Internet after a couple of minutes after having established a wireless connection. I can connect to my WLAN and access whatever, but after a certain amount of time, the WLAN status will change to "Connected without Internet access".

I have no networkdevices between my clients and my ISP's router, no firewall, no nothing. I'm 99.99% sure this is caused by some domain being blocked by my Pihole, but I can't find anything which stands out in the query log. I assume it only drops the connection when the Androids can't reach some kind of service or status domain, which only runs on a unspecified interval or after an amount of data has been exchanged, and after failing to reach that, will simply disable Internet access.

Debug Token:

https://tricorder.pi-hole.net/zjJ0YNvy

[wd9895]

Does it work if you disable blocking on the Pihole admin site ?

[Some_Duder]

Good question - yea, disabling blocking or even bypassing the Pi entirely makes the connection stable.

[wd9895]

You should disable all blocklists and add one by one to find the one which disturbs the proper work of your clients.

For example if I read here users with millions of blocked servers on their pi configuration I'm not surprised if their windows fails in many respects.

[Some_Duder]

Alright, thanks for the advice thus far. It indeed might be a blocklist I added in the past few months. It's just a shame that I can't seem to catch which domain this depends on. Or why this is even a thing... Google checking to make sure a device can load their advertisements, and cutting off Internet access if it can't, is absolutely bizarre to me.