The Bug
When I place an item frame on the ceiling, and an item in there, and then attempt to remove the item and the frame, both drop on top of the roof, instead of coming down from the ceiling. The roof/ceiling is one birch planks thick.
Steps to Reproduce
Build the setup as shown in the attachment below. setup.png
Switch into survival mode and destroy the item frame.
Take note as to whether or not the item frame is dropped above the diamond blocks or below them.
Observed Behavior
Destroying item frames and contents within them that are attached to ceilings drops the items above blocks.
Expected Behavior
Destroying item frames and contents within them that are attached to ceilings would drop the items below blocks.
Linked issues
is duplicated by 19
MC-274651
since when you put an item frame on the ceiling and then want to remove it, it doesn't give you the item in survival.
Resolved
MC-271905
Item frames and items inside it get catapulted through the ceiling when punched if item frame itself is on the ceiling
Resolved
MC-270388
Item Frames Destroy Themselves
Resolved
MC-265794
Maps removed from overhead item frames disappear
Resolved
MC-265607
Item frames on the ceiling don't drop items or the frame itself.
Resolved
relates to 2
Attachments
Comments 36
I duped this report for 1.13 (sorry Mods)
FWIW
I also tried this near Y=1. Placing an item frame on the bottom surface of the rock above and then breaking the frame causes the frame to float up through the solid blocks until it hits air. In my case, the natural surface at around Y=63
Still an issue in 1.21.
The cause of this bug seems to be that items popping out of frames are always given a set velocity upwards. So when frames are under a block they get sent into that block and flung out randomly.
This mechanic is especially frustrating with item frames underwater because items are given a velocity upwards combined with the buoyancy of items means they always go rocketing towards the surface. Imgur video of the problem
Did some extra testing: This happens through at least three blocks.