Siri & Siri AI seem to stop working with iCloud Private Relay blocked

I have in my Pi-hole instance dns.specialDomains.iCloudPrivateRelay = enabled. Now I noticed Siri and Siri AI stop working. Is this true for everyone? Or maybe there is something else blocked on my network? iCloud Private Relay is already disabled on my iPhone, but it seems Apple is still trying to use this in order to use its services. Am I right or wrong?