Huh! Weird - that sounds like it might be a problem with your keyboard? Puzzlescript pretty much handles input itself, so I can’t imagine what else could be causing it.
I suspect it's key repeat from holding the action key slightly too long. I had that a few times.If you want to avoid it norepeat_action in the prelude would make grab and place always take 2 presses without affecting the movement rate.
Ooh, I see! I’ll look at changing that when the jam ends. Thank you!