These two issues have been in minecraft bedrock edition for a while, so I'm hoping you're able to fix them. When playing on two player split-screen mode on a console, the size of the items held in your hand are much larger then they should be, and don't actually swing towards the center of the screen (it swings more towards the left side of your screen) Playing on horizontal split-screen is almost impossible to play. They second issue is when players are playing split screen and holding shields. When player one and two are near each other, if player 1 looks towards player 2, player two's shield blocks a large part of their screen. I've attached a video that will hopefully show the item sizes and this shield bug (recorded from the nintendo switch)