iOS 14.0.1 what's app and camera crash unexpectedly

Upgraded week of Sep 21st to iOS14 on iPhone 11. All ok. 2 days later upgraded to iOS14.0.1. OK until Sep 28th, when what's app crashes unexpectedly (unable to open and type a message, perform a backup, etc. When launching the camera, the camera screen is black!

Had same issue with iOS12 and 13 on iPhone XR. At that time took iPhone XR to Apple store, was advised to be a software issue. Took all steps suggested by Apple expert, but unfortunately did not resolve my case (remove whats app, re-install; or remove whats app, wipe iPhone, re-install from backup without whats app, and then download and install whats app).

Apple team - please check this bug and fix ASAP!

Thanks, Eddie.