Any known fuel odor issues with 2015's?

2015 quad cab, V6, 20K miles.

I notice a very strong fuel odor, every once in a while. (once a week or so). I generally turn up the blower to see if its coming from within the cab or smell from off the street....I cant tell where its coming from, but it generally lasts about 10-15 seconds after a stoplight. I usually just chalk it up to someone else's fuel leak (dripping gas at a stop light) but Im starting to get concerned as I near the end of my warranty. I know that until I can replicate it 100% of the time, the dealer will shrug it off. Has anybody experienced the same or am I just freaking out whenever I smell someone else's rich exhaust or spilled gas?

 

Never heard of any fuel leak issues. Ive never smelled fuel in or around my truck.

 

Re circulation?