Issues with materials in Split-Screen

I’ve added split screen to game I’m working on. However, It causes issues with materials. Here’s how material looks like in single player:

And here’s how when split screen:

Does anyone know what could cause this issue?

Fond the solution. Turns out it had something to do with one of my blueprints. I had a shrinking sphere that had play area inside it, but I’ve disabled “Cast Shadow” for it’s mesh. Turning it on fixed the issue.