'permission denied' on Allow page to be opened without authentication anyone❓

Happy new year to all!
I submitted a bug in the tracker but wondered if anyone else had experienced this ‘permission denied’ message with iOS app preview when loading a page that’s enabled to be opened without authentication… I did not find any relevant posts about it.

It looks like this issue is somehow addressed by using the firebase anonymous auth component. It seems needed regardless of the firebase Cloud Firestore rules in place.