Steps to reproduce:
Place a chest and put something in it;
Ctrl + Pickblock it;
Place the chest next to the original one;
Open the newly placed chest.
Expected results:
The chest is opened normally.
Observed results:
The original chest is opened, instead of the new one. Although the inventory displayed is still from the new chest, the items in it can't be moved to your inventory. When you try to move them, they'll disappear and reappear when the chest is reopened.
keywords for search: advanced pickblock pick block mmb ctrl control clone ui inventory
Related issues
is duplicated by
Comments

It seems as though the two chests link as a double chest on the server thread but not on the client thread, so when you try to open the second chest it triggers the first chest to open, but then treats that as a single chests and only shows the first chest inventory and animation.