Unexepected Behaviour with Bunker Door & Mechanized Airlock Below It

1. Meteor impacts seem to damage tiles/solid blocks of any kind within the row directly below the bunker door. I'm curious myself if this is a bug or expected behaviour I need to be designing for.
2. The impact blast does not damage regular foreground buildings, and an open airlock is this, hence it's not getting damaged.
3. The 'hovering solids' is visual/control bug. When you see regolith above a horizontal bunker door, that means there's also regolith within the bunker door, game just doesn't show it in the "null overlay".  You can see it's there in the materials overlay, the issue with controls is that there's no way to issue dig command on materials within open airlocks/doors.
4. There's another bug I reported yesterday, that vertical open doors don't let regolith fall through no matter what. Not sure if it's new, I recall seeing "regolith chewer" builds way back where I can't imagine this would have gone unnoticed -