Hi Frank,
This may be something similar that I posted that you could look at Custom Maintenance Window Process
One thing to note is around the timing when the agent will run the action, I have set up actions to run every 15 minutes (as an example) but depending on the load of the server, this can sometimes take 30 to 60 minutes to run. So the “scheduling” on actions does not always happen when you would expect. I started a thread on that too Slow processing of content. I seemed to see this on systems with 8 or more processors. Really odd.
Martin