Hi i just had a weird issue with the trader, after unlocking lvl2 with badger he had nothing in the second tab (II)
and then when i was selling stuff i shift clicked items by mistake while on the Badger trader page while i was on sell instead of buy, and that made all the items disappear from trader page, here is a screenshot
Update: Fixed, i reinstalled this mod, updating the mod without deleting the first version first caused this issue