Fisrt, always love your work Digi.
Survival, all air things enabled. inside a ship with 2 floors, we were using the normal non collapsing ladder.. Over time, the standard ladder seems to build up presurization ( we would completely de-pressurize the cabin, to speed up entering and exiting ) its like the square the ladder occupies doesnt depressure, but when re-pressured it got "pressure x2" and the next time same result it recived "pressure x3" and so on.. eventually when returning to the ship and opening the door, mass explosion of force ( no damage just a permant square of death ) any time anyone tried to walk within 1 square of the effected square.. death.. tried this in a number of different ships, using different mods ( even without any other mod ) same end result.. removing the non-collaspsing ladders from the ship removed the issiue in all cases.
Have yet to test it with the ladder hole being greater then 4 squares from a door.. don't think that has any bearing.. Spent greater then 20 hours trying different ways to avoid death pressure explosion.. gave up waited for fix.

I hope this is explained well enough to solve the issiue or at least point you in a direction that might "find a cure"

If you need more details I can write this is much greater detail.