Hi! I think these boxes appear at the start but I can’t say for sure. And… I actually can’t reproduce it anymore either. I don’t know what happened. It’s just gone now!
I’m playing on Arch Linux on i3wm using GTX 1650 SUPER (with the latest proprietary drivers).
But I’ve found another fun bug while testing. When you scroll the mouse wheel your ship moves vertically very fast. So fast that you can get yourself out of the map!