DiscoveryPlus app will not stream video when going through pihole due to DNSSEC in pihole

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 -

  1. Could pihole's implementation of DNSSEC be buggy or is it more likely that the DiscoverPlus app is buggy?
  2. Is there a way in pihole to use DNSSEC for all clients but a special list by IP?