One of the bear traps to the right is also wonky: it triggers once you step on it, but the bear trap entity remains and behaves just like the mine. Meanwhile, the bear trap next to it works as intended.
When I import the traps in my game, they work normally, but players have experienced this before and I can't figure out why it's happening. At first I thought it's got something to do with player-deployed traps, but I just did some testing and couldn't replicate the issue. What I do know is that for some reason the trap's trigger (which activates the trap when the npc enters the associated tile) is gone. What triggered it and when - I don't know. I'll do some more testing in the future, so we'll see.
P.S. Thanks for the save. Helps us a lot.