I found the issue: Settings>DNS>Advanced DNS settings>DNSSEC
Disabling DNSSEC allows streaming on the appleTV. If I enable it again, the streaming breaks.
@jfb -
- Could pihole's implementation of DNSSEC be buggy or is it more likely that the DiscoverPlus app is buggy?
- Is there a way in pihole to use DNSSEC for all clients but a special list by IP?