Minor Oxygen Conversion Symptom doesn't work at all

[Podrick Equus]

Title, just tested it on myself. The pathogen itself had 0 Mutativeness, 40 Advance speed, with a few other symptoms that did work properly, so I know that the pathogen was not inert. I also tested it on and off for a full 20 minutes after I infected myself with it.

What the symptom is supposed to do is convert OXY damage into BRUTE damage, therefore letting you "breathe" in a vacuum.

What actually happens is nothing, you take OXY damage as normal in a vacuum.

I suspect that the other Tier 5 beneficial symptom, Oxygen Production, also doesn't work.