Strange issue happened where I had several agents scheduled with 24hr time, and this resets on 24hrs, but after DST, the agents were stopped:
Mar 11, 2024, 1:01:07 AM

Computer has finished its scheduled uptime

The startup schedule is configured:
H H * * *

The scheduled uptime is:
1440

Keep online while builds are running is checked.

It seems to me what happened is when time went ahead 1 hour, some check was exceeded. Not sure if this is intended behavior. Under normal conditions I think the agent would just always be up, so perhaps the user wanted the agent to always be up and the agents should not have had a scheduled uptime configured.