When I was playing 2-player split screen with my husband (he was player 1, top half of the screen, and I was player 2 on the bottom), there was a strange graphics issue for me when he rode in a minecart. We converted a map from the console edition, and there is an extremely long section of track. While my husband was riding in the cart, if there were any blocks adjacent to the track (such as the walls/ceiling of a tunnel), my screen was obscured by blackness relative to where the blocks were with regard to his minecart (see screenshots). When there were no blocks next to the track (such as when riding on a bridge), there were no issues. I have not ridden the track since we converted to the bedrock edition, so I don't know if player 2 will also cause issue with player 1's graphics.