Auto-Actions/Sticky Spacebar?

So, I logged back into my old world, and suddenly Willow is just auto-doing everything--including filling her inventory and then constantly dropping something on the ground and trying to pick it up, over and over.  She just does whatever the second she gets near an item, without my actually pushing spacebar.  Obviously this is a problem as sometimes things are left on the ground for a reason and inventory space is important.  (Also she keeps trying to pick my oldschool farms' crops, which I'm keeping there on purpose as a memento.)  

No, I don't have any mods that would allow auto-actions.  It's like I accidentally toggled an option, but I can't see anywhere how to UNtoggle it, which is why I think it might be a bug. Looking up "don't starve together auto pickup" yields people REQUESTING that or talking about mods that do it, not "Help my game is suddenly doing stuff for me!"  

Pretty sure it's not regular Windows sticky-keys, or otherwise my spacebar would just keep spacing constantly while I'm trying to type.

So that's why I figured it might be a bug.