The crash logs for my app show an occasional crash that happens during the launch of the app. The highlighed line is "CoreBluetooth -[CBUUID initiWithData:]. The stack trace ends with "static AppDelegate.$main()".
My app does use Core Bluetooth, but there are no Bluetooth related functions in the App Delegate. Also, my app does not use [CBUUID initWithData:] explicitly anywhere.
With a stack trace that contains no reference to any of my code, it is extremely difficult to figure out what is going on. I cannot reproduce the crash on any of my own devices. One of my affected users says the app crashes on startup on his phone consistently, even if he deletes and reinstalls it.