If you filter (search) your inventory it won't reset if you barter
So if you try to use a search (filter) in the inventory then exit the character menu (but leave the search word on) and then barter with a vendor your inventory will stay filtered in the barter menu. Is that intended ? If not, a good fix would be to show the search bar in the barter menu too (instead of resetting the filter word).
Edited by Andrei