NextDNS does not resolve mail.google.com
Hi, I'm again having problems with the Gmail website on my Mac behind a FRITZ!Box router.
NextDNS does not resolve mail.google.com, while all other Google domains/services (search, maps, drive) work fine. Gmail via the macOS mail client works fine as well.
It has to be a NextDNS problem, because it disappears when I use another DNS on the Mac.
On the other hand, there is nothing negative showing up in the NextDNS logs regarding mail.google.com. The last successful resolve was four hours ago, no blocked requests show up, but also no new requests (which is strange).
The router (and maybe its own DNS cache) seems not to be the problem, other machines using identical NextDNS settings (not the same configuration profile, but identical settings within their configuration profiles) work fine.
I tested, if some other caches might be a problem, by specifically blocking an URL in NextDNS and later unblocking it again. After not working for a while, it was resolved again at a later stage, maybe 10 minutes later. So only NextDNS has an influence.
I of course flushed the DNS cache on the Mac, rebooted it etc.
Any help or ideas would be greatly appreciated.