Hi Rudy,
As AtsK said, the latency is present and distinguishable if a pawn has a camera component. It appears everywhere except in VR Editor mode or in Play mode without a camera on the used pawn.
I just noticed the same issue in one official VR Game, Pool Nation, done in Unreal Engine 4 too.
The latency is really obvious when looking at the chaperone grid and moving. The grid is not moving at the same speed as the game world.