This bug can be seen by many people that destroying the iron door with bare hands can also drop objects. As a matter of fact, a pick should be used to drop objects and not drop anything. After I saw Minecraft Wiki watching the destruction of the iron gate, I tried it. However, after the destruction of the iron gate, it can still fall off the iron gate, even the upper and lower parts will fall.

Steps to Reproduce:

1. first get the iron gate
2. into survival
3. after adjusting, do not destroy the iron gate with a pick.
4. after the destruction, pay attention to the drop of the iron gate

When you look at the screenshot, please look at it in order