Fair enough.

However you might like to note the time it happens next and then on your next reboot take a quick look in your journal and perhaps point something like lnav at /var/log and see if anything jumps out.

  journalctl --since "2023-04-13 09:00:00" --until "2023-04-13 09:05:00"
  https://docs.lnav.org/en/v0.11.1/usage.html#time

EDIT: formatting