Dropping a nanner or two in late flower is not the end of the world, especially if it only happens on the seed plant and not with the clones. You might miss out on a lot of good shit if you are just immediately tossing any plants that show a nanner or two.
Back in the day when I would read grow journals for hours I noticed something interesting.
The better growers who had the top notch genetics circa 2009ish would regularly experience late nanners with the usual suspects; ecsd, chems, ogs, rez everything, etc and not freak out or chop the plants from the rotation most of the time.
See newer growers, 1-3 years experience, grow the same strains and get the same results from the plants. They'd complain, talk about how much they spent to find 1 really good female and guess what? It threw nanners. Obviously you can't keep plants that toss out some nanners, don't matter if they're probably sterile or been flowered too long or stressed in a multitude of ways.
Let's talk ecsd as an example. From clone it definitely throws nanners. You can reverse it and get plants that throw no nanners and might be superior to the clone only in a few ways. Funny you can take a plant known to throw nanners, stress it into going full herm, and get great intersex free offspring.
I understand the thought process of being scared of intersex traits but it shows some naivety when you crusade against them.