If you drop a stack of coins on a used move dispenser, it eats them and give you nothing. (v3.2.0 and 3.2.1) It'll also eat your coins if you drop them on it when it's not your turn.
I also entered a shop and was presented with no choices, but refreshed and continued and there were choices again. No idea what the trigger was.
And the game also froze on completing a run. Screenshot of logs for your perusal, Screenshot of game would just be a screenshot of a completed screen, lol.