Anti-Entropy Thermo-Nullfier cloning gas

I noticed this when the area where the Nullfier was located was just full of carbon dioxide as if it was producing it, and I mean producing ALOT of it, more than an active petroleum power plant. and it started to just flood the whole area and is currently working its way down slowly through my base.  The spawned Nullifier is located pretty far up about 10 or 15 tiles from space.  I don't have anything that can generate carbon dioxide other than dupes that come by it occasionally to dig and do things in the area.  I noticed that when the Nullifier is active the temperature was floating near the condensing temp of the carbon dioxide, and it would go solid then to liquid and cycles like that every few seconds.  When it phases more carbon dioxide would seem to just spawn out from the Nullifier and fill the area.

I managed to stop this "bug" by decontructing the original tiles under the Nullfier and replaced it with mesh tiles, this would break the phase cycle from liquid and solid.  This stopped the production of the carbon dioxide.