Selecting the background dialogue topic when speaking with Vycius Pitio spams errors to the warning file and crashes the game. Attempted 3 times and crashed each time. Selected this topic at the end of the IL questline for the questgiver.
If you find Jebyn's corpse in Ivon Seloth's apartment and report it to a guard, they'll immediately arrest him. The player should be able to choose whether or not to report it when they choose the topic.
1. Guards that come to help start fighting each other.
While they fight foes, I guess they've hit each other, I'm not sure, and thus started fighting each other.
Didn't try to reproduce.
2. Foes will only target guards.
As guards were stuck fighting each other near the entry to the cave, I met a foe that talked, answered some questions, and then attacked "me": he ran past me, and to the guards to fight them, running all the way to the other side of the cave to reach them.