Switching the automatic daylight saving time off and back on seemed to have solved this. So my problem is probably related to the tasks running continuously -problem.
It would be nice to know if this is going to be fixed and should we expect this problem to return when the DST ends (Oct 27th)?
The problem returned, just noticed that one of the tasks was hung and after canceling it the scheduler is now running all the tasks non-stop.
The Scheduler worked without hangs for about a week after switching the DST off and on.