Hello Keen SWH,
Some time ago I've discovered that sometimes the game starts infinitely scrolling up/down, but I didn't knew what was the cause (tought it was some kind of random bug). One day when I was playing on my notebook without a mouse I've discovered that whenever I touch touchpad with more than one finger (like for scrolling) the game starts auto-scrolling, also found out that there are people on other forums complaining that navballs and drawing pads also caused this weird behaviour.
Steps to bug:
1 - Open Space Engineers
2 - On any screen (even main menu), try to use touchpad's scrolling move
3 - Done, until reloading the game it'll keep scrolling