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  1. Hi there, I'm using Bluetooth-LE, and I can see that apps might crash in RELEASE under TestFlight, while they work well in DEBUG. This happened never on older iOS versions, so I still try to find the real reason for crashing. What I think is that the bluetooth-le flag not only controls the download from AppStore, but maybe also might cause internal crash's, if not defined. I use bluetooth, with UIBackgroundModes "location", "bluetooth-cetral" and "audio" background modes, which worked well before (and still does in DEBUG), but now shows the typical permission crashes, all on modern phones and iPads with iOS13.4.1. My configuration: Rx10.3.3, XCode 11.4.1, iOS13.4.1. Maybe I need to define bluetooth-le in the UIRequiredDeviceCapabilities, or does that doesn't make any difference in apps behaviour ?