Maybe natural variation? If it is a good pod, save the seeds and look for the same disreable traits in the progeny.
I also want to mention that I have been noticing a LOT of so-called "breeders" are just making crosses, leaving them in the F1 status and NOT breeding their stock to near inbred lines, or more commonly known as "stable." You would get some variation with F1, and I would make a small wager to say that if you plant the seeds from that pod, that you would get a large range of variety in pod shape, size, flavor, and heat level from the next generation. IF you do, then it is likely in the F2 stage. This all is assuming that another plant did not pollinate the flower that made this pod, then my above wager is off, lol. It would be a F1 cross of a F1 cross, meaning there is so much genetic possibility, no manner of prediction could be made.
Just a thought, keep on growin!
mrgg
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