I started having very frequent (almost every day, sometimes several times a day) crashes/reboots (1-2 seconds freeze then full reboot) since two months ago or so (I think it might be starting from FP4.SP21.B.048 but I am not sure). I am not sure how to get error traces or if it is even possible with the stock OS.
In any case, I think I have managed to narrow the issue down to using 5G, as I’ve been running for 2 weeks without encountering any crash by switching the preferred network type to “4G/3G/2G”, and got a crash within 24 hours of enabling 5G again.