REPRO STEPS

1. Start Editor
2. Disconnect HMD
3. Start play mode
4. Stop play mode
5. Connect HMD (Wait for MRP to say "Ready")
6. Start play mode again

> Unity.exe!VRDeviceHoloLens::GetHoloLensPose(void) Unknown Symbols loaded.
Unity.exe!VRDeviceHoloLens::UpdateAllCameraInformation(void) Unknown Symbols loaded.
Unity.exe!HoloLensUpdateDeviceInfoCallback() Unknown Symbols loaded.
Unity.exe!VRDevice::EarlyUpdate(void) Unknown Symbols loaded.
Unity.exe!VRModule::EarlyUpdate(void) Unknown Symbols loaded.
Unity.exe!`VRModule::VRModule'::`23'::InitializationXREarlyUpdateRegistrator::Forward() Unknown Symbols loaded.
Unity.exe!PlayerLoop(void) Unknown Symbols loaded.
Unity.exe!PlayerLoopController::UpdateScene(bool) Unknown Symbols loaded.
Unity.exe!PlayerLoopController::EnterPlayMode(bool) Unknown Symbols loaded.
Unity.exe!PlayerLoopController::SetIsPlaying(bool) Unknown Symbols loaded.
Unity.exe!Application::TickTimer(void) Unknown Symbols loaded.
Unity.exe!MainMessageLoop() Unknown Symbols loaded.
Unity.exe!WinMain() Unknown Symbols loaded.
Unity.exe!__tmainCRTStartup() Unknown Symbols loaded.
kernel32.dll!00007ffecbcb1fe4() Unknown No symbols loaded.
ntdll.dll!00007ffecc72ef91() Unknown No symbols loaded.