Shift clicking items into hopper can create ghost items, and rarely duplicate them
The Bug
When Shift-clicking items into a hopper which feeds them back to the player, a ghost item can be created. once created, the ghost item can be added.
How to reproduce
- make a setup that automatically feeds back items you input to a hopper like the one in the image
- put at least two different items in your inventory (works best with 3+)
- begin shift-clicking the items into the hopper as fast as you can
- if a ghost item is created, make sure it is not on the leftmost slot of the hopper inventory
- shift-click the ghost item over and over to create duplicates of it
- (optional) shift-click the ghost items into your inventory, it will appear as though you duplicated them and if you try and interact with them or exit the hopper inventory they may disappear
Note: this works both in survival and creative modes
Note: I have been able to put the ghost items into a container and then break it, which makes these items duplicated, however, it was very hard to reproduce and seems like it's based on the pure chance that when you go into the inventory of the container the items don't disappear, however, this should be looked into.
Environment
Windows 10, Java edition, Specs in video
Created Issue:
Shift clicking items into hopper can create ghost items
When Shift clicking items into a hopper which feeds them back to the player, a ghost item can be created.
- if it is not in the leftmost spot of the hopper, shift clicking the same item in will make more of it.
- it will disappear if the player tries to grab it.
- if the player shift clicks on the item it will be transferred to his inventory but will disappear when exiting the hopper interface or trying to further interact with it.
- tested on both creative and survival mode.
Environment
Windows 10, Java edition, Specs in video
When Shift clicking items into a hopper which feeds them back to the player, a ghost item can be created.
if it is not in the leftmost spot of the hopper, shift clicking the same item in will make more of it.it will disappear if the player tries to grab it.if the playershift clicks onthe itemit will be transferred to his inventory but will disappear when exiting the hopper interface or trying to further interact with it.tested on both creative and survival mode.The Bug
When Shift clicking items into a hopper which feeds them back to the player, a ghost item can be created. once created, the ghost item can be added to.
Recreation
- make a setup that automatically feeds back items you input to a hopper
- put at least two different items in your inventory (works best with 3+)
- begin shift clicking the items into the hopper as fast as you can
- if a ghost item is created, make sure it is not on the leftmost spot of the hopper inventory
- shift click the ghost item over and over to create duplicates of it
- (optional) shift click the ghost items into your inventory, it will appear as though you duplicated them but as soon as you try and interact with them or exit the hopper inventory they will disappear
Note: this works both in survival and creative modes
The Bug
When Shift clicking items into a hopper which feeds them back to the player, a ghost item can be created. once created, the ghost item can be added to.
Recreation
- make a setup that automatically feeds back items you input to a hopper
- put at least two different items in your inventory (works best with 3+)
- begin shift clicking the items into the hopper as fast as you can
- if a ghost item is created, make sure it is not on the leftmost spot of the hopper inventory
- shift click the ghost item over and over to create duplicates of it
- (optional) shift click the ghost items into your inventory, it will appear as though you duplicated them but as soon as you try and interact with them or exit the hopper inventory they will disappear
Note: this works both in survival and creative modes
The Bug
When Shift clicking items into a hopper which feeds them back to the player, a ghost item can be created. once created, the ghost item can be added to.
How to reproduce
- make a setup that automatically feeds back items you input to a hopper
- put at least two different items in your inventory (works best with 3+)
- begin shift clicking the items into the hopper as fast as you can
- if a ghost item is created, make sure it is not on the leftmost spot of the hopper inventory
- shift click the ghost item over and over to create duplicates of it
- (optional) shift click the ghost items into your inventory, it will appear as though you duplicated them but as soon as you try and interact with them or exit the hopper inventory they will disappear
Note: this works both in survival and creative modes
The Bug
When Shift clicking items into a hopper which feeds them back to the player, a ghost item can be created. once created, the ghost item can be added to.
How to reproduce
- make a setup that automatically feeds back items you input to a hopper like in the image
- put at least two different items in your inventory (works best with 3+)
- begin shift clicking the items into the hopper as fast as you can
- if a ghost item is created, make sure it is not on the leftmost spot of the hopper inventory
- shift click the ghost item over and over to create duplicates of it
- (optional) shift click the ghost items into your inventory, it will appear as though you duplicated them but as soon as you try and interact with them or exit the hopper inventory they will disappear
Note: this works both in survival and creative modes
The Bug
When Shift clicking items into a hopper which feeds them back to the player, a ghost item can be created. once created, the ghost item can be added to.
How to reproduce
- make a setup that automatically feeds back items you input to a hopper like the one in the image
- put at least two different items in your inventory (works best with 3+)
- begin shift clicking the items into the hopper as fast as you can
- if a ghost item is created, make sure it is not on the leftmost spot of the hopper inventory
- shift click the ghost item over and over to create duplicates of it
- (optional) shift click the ghost items into your inventory, it will appear as though you duplicated them but as soon as you try and interact with them or exit the hopper inventory they will disappear
Note: this works both in survival and creative modes
The Bug
When Shift clicking items into a hopper which feeds them back to the player, a ghost item can be created. once created, the ghost item can be added to.
How to reproduce
- make a setup that automatically feeds back items you input to a hopper like the one in the image
- put at least two different items in your inventory (works best with 3+)
- begin shift clicking the items into the hopper as fast as you can
- if a ghost item is created, make sure it is not on the leftmost spot of the hopper inventory
- shift click the ghost item over and over to create duplicates of it
- (optional) shift click the ghost items into your inventory, it will appear as though you duplicated them but as soon as you try and interact with them or exit the hopper inventory they will disappear
Note: this works both in survival and creative modes
Note: I have been able to put the ghost items into a container and then break it, which makes these items duplicated, however it was very hard to reproduce and seems like it's based off of pure chance that when you go into the inventory of the container the items don't disappear, however, this should be looked into.
Damian: Please explain it here instead.
The Bug
When Shift
clicking items into a hopper which feeds them back to the player, a ghost item can be created. once created, the ghost item can be addedto.How to reproduce
- make a setup that automatically feeds back items you input to a hopper like the one in the image
- put at least two different items in your inventory (works best with 3+)
- begin shift
clicking the items into the hopper as fast as you can- if a ghost item is created, make sure it is not on the leftmost s
pot of the hopper inventory- shift
click the ghost item over and over to create duplicates of it- (optional) shift
click the ghost items into your inventory, it will appear as though you duplicated thembut as soon asyou try and interact with them or exit the hopper inventory theywilldisappearNote: this works both in survival and creative modes
Note: I have been able to put the ghost items into a container and then break it, which makes these items duplicated, however it was very hard to reproduce and seems like it's based o
ff ofpure chance that when you go into the inventory of the container the items don't disappear, however, this should be looked into.The Bug
When Shift-clicking items into a hopper which feeds them back to the player, a ghost item can be created. once created, the ghost item can be added.
How to reproduce
- make a setup that automatically feeds back items you input to a hopper like the one in the image
- put at least two different items in your inventory (works best with 3+)
- begin shift-clicking the items into the hopper as fast as you can
- if a ghost item is created, make sure it is not on the leftmost slot of the hopper inventory
- shift-click the ghost item over and over to create duplicates of it
- (optional) shift-click the ghost items into your inventory, it will appear as though you duplicated them and if you try and interact with them or exit the hopper inventory they may disappear
Note: this works both in survival and creative modes
Note: I have been able to put the ghost items into a container and then break it, which makes these items duplicated, however, it was very hard to reproduce and seems like it's based on the pure chance that when you go into the inventory of the container the items don't disappear, however, this should be looked into.
Shift clicking items into hopper can create ghost items, and rarely duplicate them
duplicates

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Hello!
This is a duplicate of
MC-29318, which has already been fixed in the 1.17 development versions.Thank you for your report!
We're tracking this issue in
MC-29318, so this ticket is being resolved and linked as a duplicate.That ticket has already been resolved as Fixed. Please check the Fix Version/s field in that ticket to see in which version this behavior was or will be fixed.
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