"Buchanan in the Shadow Realm" completed in spite of lockups

About half way through "Buchanan in the Shadow Realm", Leymore got locked in his ice spray animation and wouldn't follow me any more. So I kept on going with Cai. About 3/4 of the way through the mission one mob became glitched so we could no longer attack it. Luckily it was in a room with the 5 switches, where the door opens after all switches are hit, even if mobs remain. Cai was focussed on the glitched mob and wouldn't follow me. So I healed him and left him there. Cleared the other rooms solo. It still let me into the boss room to talk to Buchanan and the mission completed! Just while I was typing this, Cai teleported into the boss room, but as far as I know Leymore is still spraying ice crystals at non-existent mobs.

Not sure if character glitches are common enough in "Buchanan in the Shadow Realm" to warrant adding this to the page, so I'm putting it in discussion. Maybe this sort of thing is rare, and I was just unlucky to get 2 glitches on a single run. If others have encountered similar glitches, perhaps the main page should have a note that glitches like this aren't fatal to completing the mission.