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#30
First ever post!!
I have the same problem of Maintenance in progress whenever my laptop is idle. I do not have the KB5015807 installed but I do have it's preview KB5014666 installed as of 2nd July. Event ID 800 is written to Application and Services Logs-Microsoft-windows-Task Scheduler in pairs. Maintenance state changed to 3 when in progress, changed to 1 when not in progress. Prior to 2nd July I see 6 or 7 pairs per day. After 2nd July install of KB5014666 I see many more pairs - dozens per day.
There are also 3 warning entries in the same log at the time of the install referring to .NET tasks requesting wakeup, but Task scheduler shows these tasks as DISABLED, but last run on the 2nd July. My speculation is that Maintenance is in progress waiting for these tasks to run and turn off the wakeup request but the tasks are disabled so will not run. I cannot tell what the tasks are doing as the action is 'Custom Handler'