eheh, i doubt that's a tiny bug but sure x)
it is something we knew from the get-go after choosing to disable collisions on boxes (which as Imated mentionned, lead to abusing levels and outright skipping most of the puzzles), so i did my best to minimize the chances of that happening via level design: i gave more than enough vertical cleareance at every button drop, so it rarely happens in normal gameplay.
the robot blocking you was totally an oversight, and definetly leads to quite frustrating gameplay sometimes though - i'll give you that. the only reason it happens is because of the interaction where Bebop gets mad when you throw too many rocks at him (totally worth it btw)
glad to hear you've enjoyed the game though!