Seems like pufts aren't consuming poluted oxygen

Could also be the case that the puft is putting out 100x more than he sucks up, which could explain why he's sucking up so little polluted oxygen and outputting a lot of slime. Currently it looks like this

I'm having a similar issue, even with the newest patch (march 17th).

I lock a dozen pufts in a room with 2500g per tile of polluted oxygen, after 40 cycles, the oxygen is at 2450g even though i have lots of slime now.

That would be bad. My current base relies on a Puft-farm to get rid of polluted oxygen. Although I have not been able to make them generate slime either...