I have set up a system to barter with piglins and I have it setup so I can send multiple stacks of gold in with bounced pistons in to piglin 1x1x2 chamber. The piglins don’t pick up the gold when it’s on the same block they are standing in when pushed in by the piston. However if I throw in a few gold manually, they pick up the gold. Some other situations also prevent them from picking up the gold suck as if a dispenser shoots out the gold onto a block adjacent to their head block. I am unsure exactly what is causing this but it’s is really limiting me when I try and make a bulk bartering setup.