I recently got an S20 FE.
I typically leave it on silent or vibrate because I don’t want it to ring while I’m at work etc. The annoying thing is that it will loudly ring at random times...maybe once a week and as early as 6am.
Of course I check the volume and it will be set to silent or vibrate as it should be. My media is always set to silent also.
I have a separate sound for notifications, so this is specifically related to the ringtone for incoming calls. There is nobody actually calling when it happens.
I’ve been lucky so far, but I’d like to fix this before it starts ringing while I’m at work.