Are you on Android 10 and Samsung One Ui 2.5 or Beta Android 11 Samsung One Ui 3.0 or the stable global release @Maino84
As suggested Clear your phone's System Cache Files by turning your phone Off and then from a set series of button presses go into the phone's System Files and clear the cache. No information is lost this way.
To help rule out rogue app(s) please consider putting the phone in Safe Mode which disables your downloaded app's but let's your stock app's keep working. If the issues stop then this highlights a downloaded app as the possible issue. Come out of Safe Mode and start deleting your most recent downloaded app's one at a time until it stops.
A very last resort is a factory reset.
A Samsung Experience Store or Samsung Service Centre can take a look.
Current Phone ~
Samsung Note 20 Ultra 5G SM-N9860_256Gb SnapDragon 865+
Samsung One Ui 3.1/ Android 11.
Yes, it is happening to my Note 20 Ultra as well (Exynos trash).
I don't remember exactly when, but started a few days ago.
Already tried to clear the cache but it didn't work.
This phone now is worse than my old Note 9...