Samsung S8+ Whole screen flashes red and blue with alarm and vibrstion

[AC Question]

I have a crazy situation - a number of times in the day at odd times the whole screen flashes red and then blue while vibrating and playing the alarm.

I do not think it is a virus and cannot figure out with what app this is associated with. I cannot associate it with any app directly. There is no message just suddenly starts flashing until I tap on screen or after about twenty seconds turns off

 

[TiminHK]

Exactly the same problem with my Asus Zenfone 3 Ultra. I've tried everything.

 

[Alan B2]

I hard reset in the end but I think it may be connected to android ware find your phone - really at a loss to what caused it.

 

[Alan B2]

After hard resetting and working for a month - again this irritating problem has returned. Out of the blue at no set time the screen flashes red and blue and the alarm rings.

Tried everything and cannot identify the problem

 

[belodion]

Have you tried Safe Mode, or does it happen so infrequently that that would not be practical?