I remember that there was a bug where I could never see the final response in a co-op conversation because it ended before I could read it.
That's still in there + what Windemere said.
Btw CO-OP players are not able to "trade" companions between eachother. My friend accidently got a companion and he wanted me to steer the companion. However we wern't able to connect the champion to my portrait.
