I just try to follow the science, I did a couple of runs in the same tent with same equipment, different strains, but I had a pollination happen in that tent due to herm in the 1st run outta maybe 4 total runs I did.
So pollen had to be stuck there in all sorts of places.
After that first run which was full of mature seeds, every other run had this inside the bud, mini unfinished seeds of some sort, at least that's how I called them but I knew it wasn't actually seeds.
After the 4th run and being so upset about this issue as it's fucking my smoking exp, I was determine to change the only constant, which is the tent, fan, reflectors etc...Being lazy and it's a 8x4 after all I took it down and cleaned it good plus I dumped the fan because I had new ac that was enough to cool it without moving air around, cleaned the reflectors, and everything else.
I did another run after that, came out awesome, no mini seeds bullshit.
But I do believe it's genetic to some part aswell, my clean has solved the issue for me but to others it could be other factors.
When you put 100 seeds of different brands and they all come out with this stuff, it's plausible to assume it's something about your environment.