I implemented BGContinuedProcessingTask in my app and it seems to be working well for everyone except one user (so far) who has reached out to report nothing happens when they tap the Start Processing button. They have an iPhone 12 Pro Max running iOS 26.1. Restarting iPhone does not fix it.
When they turn off the background processing feature in the app, it works. In that case my code directly calls the function to start processing instead of waiting for it to be invoked in the register block (or submit catch block).
Is this a bug that's possible to occur, maybe device specific? Or have I done something wrong in the implementation?
func startProcessingTapped(_ sender: UIButton) {
if isBackgroundProcessingEnabled {
startBackgroundContinuedProcessing()
} else {
startProcessing(backgroundTask: nil)
}
}
func startBackgroundContinuedProcessing() {
BGTaskScheduler.shared.register(forTaskWithIdentifier: taskIdentifier, using: .main) { @Sendable [weak self] task in
guard self != nil else { return }
startProcessing(backgroundTask: task as? BGContinuedProcessingTask)
}
let request = BGContinuedProcessingTaskRequest(identifier: taskIdentifier, title: title, subtitle: subtitle)
request.strategy = .fail
if BGTaskScheduler.supportedResources.contains(.gpu) {
request.requiredResources = .gpu
}
do {
try BGTaskScheduler.shared.submit(request)
} catch {
startProcessing(backgroundTask: nil)
}
}
func startProcessing(backgroundTask: BGContinuedProcessingTask?) {
// FIXME: Never called for this user when isBackgroundProcessingEnabled is true
}
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