I attempt to export videos from Photo Library, but the export callback is never executed. I periodically check the progress of the export, and the progress is always zero. AVAssetExportSession.Status always in waiting state The code below works in 99.9% cases, but sometimes on some devices (absolutely randomly) it stops working, and only restart of the iPhone helps. import AVFoundation let asset = AVAsset() let outputURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0].appendingPathComponent("test.mov", isDirectory: false) let exportSession = AVAssetExportSession(asset: asset, presetName: AVAssetExportPreset1280x720) exportSession?.outputFileType = .mov exportSession?.outputURL = outputURL try? FileManager.default.removeItem(at: outputURL) exportSession?.exportAsynchronously(completionHandler: { 		print("sometimes never calls") }) It is an example of the output URL: file:///var/mobile/Containers/Data/Application/B9EB607F-8F6F-4E3B-A6C3-88B580B8839F/Documents/last.mov P.S. Some other video apps also freeze on video export (Videoleap, PicsArt) but some video apps (Filto, InShot) continue working