this instance has been running for a few months now and it has ocurred a few times, three or four, that all scheduled task stops working, they no longer execute regardless of interval, the next execution date is not updated and the effects one expects from the tasks are not performed, i also checked adding log("something") to some task to see if the mesages were logged in ir.logging but no, the problem was solved when i restarted the postgresql service, initially i thought it was due to some heavy task having very little intervals, like 5 minutes for the Mail: Fetchmail Service, but upon increasing to one hour, the problem has ocurred again, both the incoming and outgoing mail server is office365.com, what could be the cause of such behavior? it is a bug? could be a misconfiguration?
UPDATE
The solution was to leave a single database
If you have some custom addons and if addons are not updating properly then you might face this issue so try to update custom addons.
i have the same problem