Uh-oh. Strange.
First mention (I’ve seen) of apparently-5G-related reboots was in July here. It seemed that specific issue was indeed 5G related, but also happened way before the A13 rollout and (apparently) wasn’t fixed by A13.
Meaning it’s totally independent of A13.
Now those new cases of reboots happening only after A13 most likely have a totally different cause (i.e. not be 5G-related).
Fairphone should consider those two reboot problems as two different issues, having similar symptoms but completely different causes, else they won’t ever manage to fix them.
Just my 2 cents worth.