Funny and amusing situations...

While playing the map "Darkness Attacks," I saw this: after visiting a sufficient number of obelisks, the Necromancer enemies figured out where the Grail was located and started digging in that area. But for some reason, the AI kind of "stumbled" in this case and dug clearly away from the correct spot. As a result – 13 (thirteen!) holes, but all were useless! When I arrived there, I understood where to dig, but I simply didn't have time: victory came just before.
Question (more like rhetorical): have you ever encountered such an "inconsistent" AI? Because as far as I remember, whenever the AI learns (approximately) the location of the Grail, it digs it up!