bug allay and new idea for mob

the new mob allay is with a problem the mob flies very high and leaves the player's presence very fast that you can't give the item to him also I can't change the item he's holding because he's flying too fast and too high it will appear that when you press the button the mob be quiet and receive the item from the player and by clicking on the junk box the mob will come to the player to receive the item or exchange the item