We have observed that the hub is restarting automatically.
The hub is autorestarting as scheduled. From hub.log:
May 4 21:39:46:116 [4596] 0 hub: Auto-restart time reached, triggering controlled shutdown
Release : 20.3
Component : UIM - HUB
Automatic hub restart is controlled by a raw configure key in the hub.cfg. The key is called "restart_schedule" and is placed in the <hub> section of the config file. Please remove this key to prevent the hub from restarting automatically.