python3.8.core (libthr)

 After being unable to login to the server (the login screen would not appear, only the page indicating the server was running), it had an unexpected reboot followed by the message above, so I am creating a ticket. As an anecdotal aside, with FreeNAS 11 I had an unexpected reboot at full load maybe once every few months. Since updating to the various versions of TrueNAS 12, I get unexpected reboots weekly. Very concerned about this apparent change in reliability.