As shown on the screenshot and log, the 2 tombstones closest to Jim just moved (I presume, in order to attack him) even though he's got his invisibility card up.
Invisibility only means that you can't be targeted directly by cards, the AI in Cardhunter isn't advanced enough to pay attention to traits. There's a reason Obvious Maneuver doesn't draw you a new card against the AI.
Yeah, the AI is just stupid. Not a bug. If you want smarter AI, that should go in suggestion forum Thanks!
Thanks for the info. Would it be possible to put that tidbit in a snarky comment on the Invisibility card? Something about the mobs still following the scent of Jim's cologne or something?