My fairphone 6 died suddenly

[UPPERCASE]

Some other people reported something similar:

Fairphone 6 keeps rebooting

My Fairphone 6 frequently shuts down and reboots. It happens when I am not using it, multiple times a day. The operative system is up to date and Google play reports “no harmful apps found”. FYI I migrated apps from my Fairphone 3+ via cable. Please help.