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..

https://imgur.com/a/3zzmCX7

I haven't tested to see if it happens with other NPC's yet but thought I should mention this.