1. Items are no longer reliably being picked up by hoppers, causing wheat and potato farms to be less efficient and causing lag.
2. Items are no longer being pushed in the correct direction by slime blocks, breaking sugar cane farms and causing severe lag.
3. Items are only slowly being picked up, causing mining to be less efficient and showing lag on slow item pick up animation.
The lag can be seen most commonly on chunk load up, so moving 16 blocks can cause the game to freeze for over a second due to items piling up. This is a game-breaking fault.
Xbox one online game.