Thanks :) I'll check the lift controls. Haven't changed them for a long time.
When the lift is stopped, one button should light up (red) to indicate the direction of movement. When it moves, other button lights up to show that you can go back. Although it could be something else, maybe something very specific to the generated level. If the lifts don't work for you as described, if you could send me a log file (in _logs folder, output<date-time>.log) at contact@voidroom.com, please.