Unreal 5.4 Niagara Lightweight emitter's gravity force does not always fall towards the ground


I have been trying to use Niagara lightweight emitters to save on performance. The rest of the nodes seems to work like regular Niagara nodes, but the gravity does not. If I rotate the emitter, the gravity will push the particles down along the negative z-axis instead of down to the ground. Since I am using UDK 5.4 and lightweight emitters are still experimental, I am not sure this is a bug or working as intended. If it is working correctly, is there a workaround I can use instead?