My partner and I both play in the same room as we've been playing this and we noticed a really awesome error last night.
My partner was in a ocnversation and then I started one as well (I was the host and they had joined my game). When I started the dialogue with a different character, their camera snapped to my character and started following him as he walked towards the left side of her screen. He walked through walls, down cliffs, down into the water, up onto docks, down into the water again and finally into blackness for awhile. Meanwhile on my screen my character was still standing where I had left him in the dialogue option.
After a while, the camera snapped back to my partner's character and they were able to resume the dialogue.
Very strange and somewhat hilarious.