Had an interesting bug... Haven't seen it mentioned yet but could be wrong.
First, I'm a ranger with summon familiar spell. I was in the Druid Grove, in the storeroom with the paralyzed NPC "Pandirna". I killed her to loot the room cause why not. While I was looting, the guard "Zorru" walked in. So I ran out but he caught my spider familiar and started having a conversation with it..