Incredible Slow DNS Resolution on iOS
For iOS and iPad OS devices something is very wrong.
I've setup NextDNS on my router and on the devices themselves using the app to apply the iOS configuration.
Regardless of whether I use the local app-based connection to NextDNS or just rely on the router's custom DNS iOS devices take many seconds to resolve the DNS name. Speeds are fine once the names have been resolved.
If I turn off NextDNS and only use my LTE connection I have no issues.