Seemed to take a long time for the update process from v2021.10.16.0004 to v2021.10.18.1626.
Checked logs and see as soon as the new version started it was trying to authenticate Fox and failed.
No longer have 6002 local Fox as a channel.
Logs submitted db0127d3-6e90-4d9f-9813-ad6017eafade
And my other server (running in a docker container) survived the update with the Fox channel intact.
Logs from that one if it helps 16e06fd8-9b11-4bce-8651-922eef5de93f.