Went down into a particular slime pit and the game just keeps spamming this on every turn. Debug killing all monsters in the area doesn’t seem to help.
I really fucking hate these “press spacebar” bugs that don’t affect anything and wouldn’t compromise my gameplay if it weren’t for the game having to tell me about them. Seriously, if I wanted debug mode on I’d turn it on, it has its own keybind.
EDIT: Enough debug killing apparently fixed it. Dunno why it didn’t the first time.