Rocket wall not broken by stressed duplicant but the gas inside was leaked

Rocket walls don't actually disappear but they are still broken like there is no tile there. I think they usually come back on reload but if they don't, you have a free entrance to more space   When a dupe deconstructs walls, you can build tiles outside to seal the gap

I have experienced this as well.  Dupe got stressed and beat up the inside of the rocket and gas leaked out forever.  There was no way to repair the wall, you can't deconstruct the wall and can't build outside of the rocket.  I couldn't build a tile inside the rocket as it was the door and there was minimal space inside for that.

Only fix was completely deconstructing the dupe module and rebuilding it.