When completing the steps to unlock the achievement, it stays locked
Steps to reproduce:
Acquire x1 Chest minecart, x1 chest, x3 rails, x1 hopper, and x3 block of choice
place the chest on ground
place the hopper above the chest(facing down)
place a block to the left and right of the hopper
place rails on top of said blocks and on top of hopper
Place chest minecart on the rails to the left of the hopper
put 1 block in the chest minecart
push chest minecart towards hopper
fail to unlock achievement
Did you make the rails a continous line, or were there turns? it doesn't work if there's a turn.