Seeds in my feminized AK47.

Sometimes this happens when not harvest at the right time. This is the last mature stage of the flower, she starts to produce seeds as a survival strategy since it was not pollinated she makes her way to perpetuate the species. If it was not the case, can be stress by light or ph change, but the first theory I think is the most common.

You have a hermie nearby. Or there's a very virile Male just outside of your house somewhere. Almost definitely a hermie in your bunch. Check whatever plant had a lot of stress first. Those male parts are there somewhere.

Pollen can easily travel a few kilometers depending on the wind, it then gets stuck on you, you bring it inside and touch the plant while it's flowering and it's pollinated. - It's probably from hermaphrodites in someones garden in your area.