"recruited" a piglin to trade with, poped them in an area with a hopper below them, traded about 1/2 stack of gold no problem, let the nether to get a name tag, came back, tagged them and through some more gold at them but they wouldn't pick it up, even if it was thrown directly on them. The only way to trade with them was to press the left trigger, and whilst they where trading it gave me an option to "open" as if opening a chest, but nothing happened when I pressed the left trigger on this option