Steps to reproduce:
(If you haven't already) Create a new world and set it on creative mode.
Go into your creative mode world.
Go into your creative inventory and get any item that can attach to a block, like a sapling or a torch.
Place the item down.
Destroy the block underneath.
Instead of destroying the item like usual in creative mode, it drops, allowing you to pick it back up.
This also happens if you destroy a block that a torch is on the side of, or if you destroy a sign that other signs are attached to.
Linked issues
relates to
Attachments
Comments


This is an option controlled by the Tile Drops setting (or /gamerule dotiledrops
).
See also https://bugs.mojang.com/browse/MC-4681?focusedCommentId=34383&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-34383

I can confirm this. Relates to MC-4681, which is resolved as won’t fix.

This should be fixed, or there could be a gamerule called "attachedtiledrops".
Edit:Oops sorry for putting feedback in the bug tracker
I think I will create another report on the signs attaching to other signs bug.