SOLVED FOR REAL THIS TIME I THINK. See my explanation above about installing Camera FV-5 Pro. While I love the app, it did NOT solved the problem. I still recommend you get it.
What has solved it so far is this: Go to settings/Apps/Google Play Services/Permissions. Turn off Body Sensors and Camera. ALSO, Go to Settings/Apps/Google Play services for instant Apps/Permissions. Turn off Camera.
The first step did not repair but when doing both it does. Seems at some time or the other I have downloaded an app such as Google Fit or something that affected the camera focus mechanism. I’ll keep you posted.
I would still get the Camera FV-5 Pro app. You’ll love it.