Fairphone 3 is restarting during phone calls

I got my Fairphone 3 in December and I had no problems. But lately it started to restart itself during phone calls. The screen freezes and a few seconds later the screen says Fairphone and then it loads. The first time it did this was two months ago, but this was just one time and it did not happen again after that until today. I was in a call for one hour and it restarted itself three times. Why does it do that? It doesn’t restart itself when I am not in a call. I have the latest security patch.

A post was merged into an existing topic: FP3 reboots during phone calls