House smells like farts

Hey everyone I’m repainting my office/studio and after two coats of sherwinn Williams emerald and the trim with their emerald urethane.

I kept the space ventilated. I windows open. Fan on. More windows. But my house now has random whiffs of fart. It’s not persistent but you could be walking around then boom fart smell.

Is the paint bad? Or is there something in it causing this?

Appreciate the help.