As a flip side experience, I have a dream machine too; it ignored my auto update settings and updated itself anyway, there's no way to roll back, and it now regularly stops responding, has high packet loss over wifi and supports response was effectively "go jump". Very unhappy.
Yea, I've had a few problems with UDM as well. The management UI/controller container has died numerous times so to get visibility into whats happening I need to ssh in and restart that container or restart the router.
I've also had numerous cases where routing has stopped for no reason. This I find really bad as, "it has one job ...".
I have all aps and controller blocked from the internet for that very reason. Don't tell me when to update heh. Really sucks about not being able to roll things back.
