Currently I have two problems: I can not open the app on iOS Mega (if I put the 3G runs quietly, but no with Wi-Fi) and do not understand why.
And I also had problems with the Xiaomi devices (like Yeelight, Gateway and various sensors) that there were connected. But perhaps it's possibile because I activated DNSSEC.
What do you think about? Obviously I disabled the functionality of adblocking (in Pi-hole) and none of these devices is with blocked connections.
What happens if you disable DNSSEC? We added it because many users asked for it, but it is causing several problems because it might simply prevent you from connecting when the target cannot be verified (which actually what you want, right? How could it protect you otherwise?).
You can always use the Query Log page of the web interface to check what is getting blocked and send the corresponding domains directly to your whitelist.
If I disable DNSSEC the Xiaomi Gateway and Yeelight turn to work, but the app of Mega doens't.
All site are in whitelist (because it's disable, so the only function is dns) and in the query log everything looks fine, but I don't know why the app of Mega doesn't work.
So you mean that it still does not work when you put Pi-hole into Disabled state and disable DNSSEC?
Maybe you can experiment with using different upstream DNS servers.
I have 8 dns enabled.