Amusing defficiency vent fix
Created by: Probe1
The vent in xenobio was set to internal 140 kPa so it was just shitting out gas until the pipe fell below the threshold.
Fwiw I think I know who did this but I'm gonna ask them politely first before calling them out. I can only guess that they made a new instance from one of the vents in the instance list and changed its dir, innocently thinking it couldn't possibly be a supermatter chamber vent.