In the video below, I call Remove Player on 2 and 3, which results in the splitscreen going back to single player mode, but you can still hear the ground-level meteor impacts from the previous Player 2.
The way to get around this for me so far is to move the camera view of Players 2 and 3 to Player 1 before calling Remove Player on them. It’s also important to add a delay between the move and the Remove Player calls, otherwise it seems the Remove Player acts too quickly and locks in the audio from that prior location still.