There is a trade bug that when you are invited to trade while browsing your wh. The accept window doesnt come up and you cant trade with that char untill you login again. The message the person is trading with someone else will show up even when thats not the case.
Its easy to reproduce and not sure if it still the same in the next update.
Not tried in it PTS, I might have a go later.
There is a change in PTS where you can't look at items from an NPC shop and have your inventory open at the same time.
I already find it a pain in the rear.