Hey @speedfreak70
Did you start experiencing this recently, such as when you downloaded a new app or has it gone on for a while? If you follow the steps in the following link and reboot your phone in Safe Mode, does it still occur? If not, I would definitely advise removing your third-party apps one by one until you find the culprit!
https://www.samsung.com/uk/support/mobile-devices/how-to-start-my-galaxy-device-in-safe-mode/
