My phone Samsung A51 these circumstances occur, this problem appears. I want to know whether this is a general problem or not. 1. Running a fingerprint. 2. Activate dark mode. 3. Open the Facebook ex. 4. Press the power button a(lock phone)the program is running 5. Down notification bar and decrease Brightness to lowest the grey color convert to purple on notification and when remove disable finger print the lock screen do normal or when lock screen on home screen also do normal
