System was upgraded to 12.0u2.1 Friday evening (3/26). Last night, 3/29, the system went offline. The webui was unavailable, but ssh worked. I brought it back up this morning, and it had dumped core for python 3.8. Also, when I rebooted the system this morning, it did not restart s3storage, even though it is configured to autostart at boot.
Please find the attached core dump.
Core file is available at https://drive.google.com/file/d/1XQg6gfGakbNUo780h63o9FB9ANQzEyik/view?usp=sharing