Incorrect rendering on Raspberry Pi

See https://forum.devtalk.com/t/hands-on-rust-bracket-lib-on-raspberry-pi-4-running-ubuntu-mate/5309

I get a significant glitch on my raspberry pi - there is a thin line to the left of the player that runs from the top of the screen to the bottom and moves as I move the player! It works on my Mac just fine, so I think its an issue with Bracket-lib. Note that if I change the function that draws the player to do nothing, the line still exists