When breaking a crafter or a piston without a pickaxe, it will dropped as an item, despite they are made by stone, this is inconsistent with other function blocks that made by stone.
Linked issues
relates to 2
Attachments
Comments 2
Related to MC-177518
This seems like it would be intentional considering that the blocks are made entirely out of stone, where as with the piston and crafter they include parts which are wooden.
4ebugger
Hey this isn't a bug but rather a suggestion. :^)
Also these items that drop contain wood in them, just a little quirk but consider that.