When dropping items while switching hotbar slots at the same time, items can either appear to disappear temporarily, or — under certain conditions — be permanently deleted.
The issue happens both in singleplayer and multiplayer, meaning it’s likely a client-side input handling bug rather than a server desync.
Environment
Place an item (e.g., a stack of 64 cobblestone) in hotbar slot 2.
Place any other item in hotbar slot 1.
Select slot 2 (hold it in your hand).
Quickly press Q + 1 at the same time.
You drop one item from slot 2, and the item from slot 1 seems to disappear until you rejoin.
Then, try pressing Ctrl + Q + 1 simultaneously while holding slot 2.
The entire stack is dropped.
When you pick it back up, the stack is cut in half.
The missing half is permanently lost, even after rejoining.
Thank you for your report!
We're tracking this issue in MC-154881, so this ticket is being resolved and linked as a duplicate.
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