I just found this bug where it disappears like magic when I receive it (like when it’s dropped on the ground) and when the inventory is opened at the same time. It is really difficult to exploit this bug, but I accidentally did it with a diamond is Survival. Please remove this ASAP!
I found this bug on MC 1.14.4, but it might still exist in 1.14~ or even versions under that as well.
Can you provide some steps to reproduce the issue? Also, does the item disappear permanently or is it just a ghost item and does appear again when clicking on the slot or relogging?