Visual bug occurs in build when one split screen player enters a post process volume

Hi, I’m working on a game in Unreal 5.3.2 that can be played in split screen, and have been having a bug come up when one of the split screen players enters a post-process volume. When this occurs, most of the other players’ portions of the screen are obscured in black (although their UI is still visible). This seems to occur for any combination of post-process materials, as we’ve tried multiple different configurations but the only thing that works is to disable post-process entirely.

Attached are some images that show the error. Hopefully someone has some experience that might be able to help us resolve this problem. Thank you very much!