Anyone have any thoughts on why I would be getting this when using BLE on iOS?

Qt Code: 
  1. [qt.bluetooth.ios] can not discover service details in the current state, QLowEnergyController::DiscoveredState is expected
  2. [CoreBluetooth] XPC connection invalid
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Latest iOS, latest XCode, latest Qt/QtCreator...

Source code in Creator, opening project in XCode and running on device. This *used* to work a couple months ago on 5.12... but not working on 5.14.

Ideas?