Bug? Minor shipwide decompression when floor removed
Removing the floor in an already decompressed room seems to cause a slight shipwide decompression, even in sealed rooms. This effect was most easily noticed in rooms that were not connected to life support (unconnected rooms in purple in attached image) due to the cumulative loss of pressure. I suspect this is a bug, because a reasonable explanation of this effect didn't readily come to mind.
Screenshots. All rooms started at approximately the same pressures and temperatures before removing and replacing the floor in the central ring room.
Edit: temperatures and pressures remained steady in "green and purple" rooms while floor was missing. Shipwide pressure only changed when floor was added or removed.