in some cases, when i connected to a BLE device, QT crashed.
the crash happened in the function:
hr = QWinRTFunctions::await(op, result.GetAddressOf(), QWinRTFunctions::ProcessThreadEvents, 500);
or in the function setupLEDeviceWatcher() (when there are BLE device paired)
BT Device 4.2.
it is very often to happen.