Crosshairs disappear on split screen when someone is in their inventory.

I play on split screen, and when there's an even number of people playing and 1 goes into their inventory, options menu or anything like that the crosshairs flickers very very fast in and out of existence. When an odd number of people are playing: 3 the crosshairs disappear completely and it's not very fun because try building without those things. We've been playing like this for months, and it makes the game almost impossible to play.