@userKcGjCS7IBh Have you tried clearing the cache partition your phone?
Yes I already tried to but it's same ager clearing cache partition. 16 December 2019 was my warranty date. My cousin is also facing the same problem. I used every note series but from 7 I guess samsung quality is going down. Now it's time to switch to any other company. Because samsung service is really bad.
Do you experience these symptoms if you test your device in safe mode?