iOS 16 Screen Rotation Bug
Unexpected screen rotations after unlock
This came with iOS 16:
The Gyroscopes seem to stay on while the display is locked, so my last used app (e.g. WhatsApp) is often in landscape after unlocking if I hold the phone fairly flat. - I hope that's really just a bug and not intended to be a feature.
The behavior was correct in iOS 15 and before.
iPhone 14 Pro Max