A Bug with the item WIP

Hello,today when i was playing minecraft i was trying new things with the WIP when i realised that this item bugged.what i mean is that when i was throwing items like diamonds block,the item was adding 1 more block from that i was throwing.I was throwing like 4 diamond blocks and when i was going to take them back i saw 5 blocks.So good luck with that! 🙂