Issue:
The demo from your most recent blog post is broken. I tried it on iPhone 12 Pro, iOS 15.4, and the tracking/placing does not work, it is always oriented towards the camera and the scene is also drawn twice.
Once animated and rotation with the phone, once static and stuck to the center of the screen.
Affecting:
Probably everyone. for sure users on iOS 15.4
Workaround:
none