### This issue affects Redstone contraptions involving minecarts with chests in them, which get filled using a track ramped against a hopper to the south or east ### How this differs from the expected behavior Items should get moved from a hopper into a minecart with no player interaction, and items moved by the player should not get reverted/deleted. Instead the hopper locks up, putting nothing in the cart because it immediately pulls the item back out. If a player puts something in the first slot of the cart the hopper will add an item to the last slot of the cart and pull the item from the first slot. ### How the issue manifests itself Build a hopper with track ramped against it, with a fence to keep the cart on the slope. It seems to happen most consistently with the hopper to either the east or south of the track but it isn't totally reliable. B F H\_ Fill the hopper, and they should be fed into the minecart, but nothing happens and the cart stays empty. Now put an item in the first slot of the cart, and an item from the hopper will be added to the second slot. Look back at the hopper, which now contains the item put in the cart in the first slot. Remove the item from the first slot of the hopper, and the next item will move to its place.