I’ve looked at the issue, and part of the problem is that some ignorant hacker added vehicle part descriptions in the rightmost window and that overran an already overloaded UI’s scroll options.
There are 4 major windows in the vehicle interaction screen: left with the vehicle diagram, center with overview of consumables, right with vehicle part descriptions, bottom with overall status.
Each one of those needs to be scrollable: you need to be able to move through the diagram, scroll the overview up and down, page through the descriptions, and scroll your fuel counters up and down.
Arrow keys for the first, <’ and ‘>’ for the second, ‘[’ and ‘]’ for the fourth, 'and then we’re out of good keybindings. The code to support scrolling through the tanks exists and as far as I know works, you just can’t access it.
I’m poking at this now, trying to figure out what’s going on.