[1.4.2] Shady Cornac glitch

[Achievement:BugFound]

Originally playing 1.3.3, I happened to accidentally wander into Derth as a Skeleton with the Cloak of Deception unequipped.
Upon seeing the town people's hostility, I equipped this (every townperson was following me around now) and went over to the shady Cornac.
I accepted his quest, but as the Arena came up, the first dialogue box did not disappear.
I could re-answer the questions, and in 1.4.2 the first dialogue box did then disappear.
In 1.3.3, I had to hard-quit the game and reloading properly put me in the Arena.

[Achievement:BugFound]

The same thing can happen with the Yeek Wayist. I was standing next to him when I realized what the problem was (he was still hostile), and I brought up Inventory, and the dialogue occurred twice while the Inventory screen was still in the background (when I equipped the Cloak of Deception).