Possible artifact trading with AI allies bug
In my current game whenever I attempt to trade an AI ally for an artifact that they aren't using the ally will accept the trade but the artifact that was given to me never ends up in my possession. They still receive whatever I traded them for it and they also still possess the artifact they supposed to transfer to me.
I'm on the current version of the Sins II with all the DLC installed with nothing else active save for a small map pack.