I have a new gas oven (bought it new ~4 months ago), a Frigidaire FGGS3065PBA. While baking for long periods, a smell of gas will begin to permeate the kitchen. During this time there were sudden bangs from inside of the oven, which I had originally assumed was the sound of metal expanding, but the other night I watched it more closely and noticed that there would be an in-oven flare up where the interior of the oven briefly fills with gas flame.
This happens in both bake and convection modes. We haven't used the broil mode yet.
I've removed the lower plate that covers the lower gas burner to observe its behavior. It seemed to be normal. The igniter comes on and the burner lights up with what appears to be an even flame on either side.
Confusingly, when observing it during this time I did not note a smell of gas. I did only run it for one heat and reheat cycle, for maybe about 5-10 minutes.
At this point I'm stumped. The flare ups are quite concerning and even caused some parchment paper in a recent bake to ignite, and they are scaring my wife. We've called the gas company but they only checked the connection in the back and confirmed that it was connected well and not leaking there.
I could really use some help on this.