Xperia X screen light issues after Orio update

[PMac086]

Having problems with screen staying dark when phone rings, it slowly comes on after 3 seconds so I can see who is calling, quite frustrating.

Also at night screen brightness keeps fluctuating 

All this seemed to happen after Orio update 

[Strampke]

Have you tried brightness settings, adaptive brightness?

Is there a cover over the top of the screen covering the proximity sensor?

Does it happen in safe mode too?