Error: Assertion failed: PipelineState.bXrFrameStateUpdated

[yoponchik]

Apparently, this was a common issue in UE5 with MSFTOpenXR
Solved the problem by putting a delay in StartARSession() in BeginPlay()

FTimerHandle DelayTimerHandle;

GetWorld()->GetTimerManager().SetTimer(DelayTimerHandle, FTimerDelegate::CreateLambda(
	[this]()->void
	{
		UARBlueprintLibrary::StartARSession(ARSessionConfig);
	}
), 0.5f, false);