When right-clicking on a bell with a block in the selected hotbar slot, in such a way that the bell rings (standing bell sides are uneffected), removes the item from the inventory. Updating the inventory slot returns the removed items to the player.
My best guess is that it is caused by either the bell animation, or some weird interaction between the use item and place block functions of right-clicking.
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ZeNico13
Confirmed in 19w12b!
ZeNico13
I did tests and found some extra things.
As said in the desciption of the bug, the block becomes only "invisible" of the inventory. As soon as the player makes an interaction, the block becomes "visible" again.
The player can click in his inventory to find the block but he can also click on the ground or interact with something (like a villager) to find him.
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Thank you for your report!
We're actually already tracking this issue at MC-145705, so we will resolve and link this ticket as a duplicate.
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