BGProcessingTaskRequest.earliestBeginDate prevents Task from being run

Hey,

I am having issues with the BGProcessingTaskRequest.earliestBeginDate property.

If I use this property, my tasks are never started. Even if I wait for 24hours, with screen off and plugged in.

In this example I use 15 Minutes from now:

class func schedule() {
        let request = BGProcessingTaskRequest(identifier: TASK_IDENTIFIER)
        request.requiresExternalPower = false
        request.requiresNetworkConnectivity = false
        request.earliestBeginDate = Date(timeIntervalSinceNow: 15*60)
        do {
            try BGTaskScheduler.shared.submit(request)
        } catch {
            print("Could not schedule task: \(error)")
        }
    }

But if I don’t set the property earliestBeginDate and keep it at nil, my task is run without problems.

I reproduces this 3 times and the task was run after 12 Minutes, 17Minutes and 12 Minutes.

One more question: What happens to my tasks if I reenter my App before the task was run? Will they be canceled or still run?

Sometimes I see following messages in the device syslog when I reenter the app before the task was run:

Jun 10 08:23:05 Tims-iPhone My App(DuetActivityScheduler)[4118] : Will expire BGTask activities: {(
)}
Jun 10 08:23:05 Tims-iPhone My App(BackgroundTasks)[4118] : Will expire activities: {(
)}
Jun 10 08:23:05 Tims-iPhone My App(BackgroundTasks)[4118] : Calling expiration handlers for activities: {(
)}
Jun 10 08:23:05 Tims-iPhone My App(BackgroundTasks)[4118] : Calling expiration handlers for tasks: {(
)}

My Task identifier is not present in this log messages, so I guess it is not affected?