https://drive.google.com/drive/folders/1ic0roAoH1u9lY9IRMF3_84A4ZjZm2qEW?usp=drive_link

Here is a link to the save file, with a list of mods, there is also a file with a list of mods that I use. Let me know if I need to reset using something other than google drive.

Hi DrSigma, after I watched your video, I think this problem may come from the change of graphic or shadow properties of the cabin wall or some thing mounted on the wall. I did encounter similar situation once a long time ago, which may be due to the property changes of the mounted mini gun, or it may be a problem caused by mounted stuff being too close to the ship's thrusters.
Also I do update the airtight properties of storage cabins yesterday, so while unlikely, this could still be the case.
I wonder if that bug still happens for every time gravship takes off? If this only happens once, I think you probably don't need to worry too much, because this will definitely due to the properties change of buildings so they don't appear consistently.
And if it still happens, I may recommend you uninstall mounted mini gun nearby the ship thrusters first.