For some reason, movement over a shadow when there is a skylight present will leave ghosting and a player standing in the right spot will cause weird lighting issues.
I’m at a complete loss.https://youtube.com/watch?v=bitG0mh_liw
Edit: it seems like the shadow ghosting occurs when the character moves in the shadows and there is a skylight.
I was also having them. I am baking with lightmass and using stationary lights. Turning temporalAA off seams to fix it, but then you have to use FXAA.