I am having the same problem too on XR. Interestingly, on iPad Air 4 (as the hub) editing a scene doesn't freeze, however, the change is not retained when closing the edit. The only way to make the change ATM is to edit it from Big Sur Home App on my Mac.
monto
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution