When playing split screen on Preview with Series S and Series X with Differed Technical Preview lighting on, player 2 is surrounded by the shadows of whatever is around player 1, and on player1 side of screen, the light from whatever is around player 2 shows up and reflects off of surrounding surfaces of player 1. I've tried multiple pbr shader packs, including Prisma PBR, Poggy's Luminous Dreams, and my own currently in development. Problem persists across all of them.

Reportedly occurs on Xbox and PlayStation.