Natural gas water heater power vent 1 year old -smell of gas when starting

[alienone]

I recently moved into a home with a gas water heater. It's working fine, there are no alarm lights or anything, but I just happened to be near it when it went on and I smelled gas. It was just literally just a second or two and the smell went away. Is this normal? I would have never noticed it if I wasn't right there kneeling beside the water tank. I checked it another time and the same thing happened.