Grid bounding box looks like vacuum to client on DS (desync)
Large open ships and stations in atmosphere will look to the client as if their bounding box is hard vacuum until the grid is updated by grinding or welding a block or doors are opened or closed. It seems the server has the correct information and doesn't choke the player. Client still plays the choking sound and realistic sounds render as if in vacuum.
This happens pretty much every time I join the server.
It seems that an air vent being present on the grid has something to do with it.