Update:If I set my phone to never deactivate it’s screen, the tasks will run in time, even if earliestBeginDate is used.I scheduled the Task two times to run in 60 seconds and it needed 21Minutes and 12 Minutes to start.Once I scheduled the task to run in 15 Minutes. This time it started after 19 Minutes.So maybe this is working as intended. But it seems weird that the task are run only(preferably) if the screen is active.