It was anyone who got props from, what I'll call, a bad batch. They sent out an email to those of us affected...said dont fly your drone and they were sending replacement props. They fed ex'd em overnight.
Because I'd mixed my new ones in with old, I emailed them amd they sent me 2 new boxes or props. Those werent overnighted but arrived in just a few days.
Back then, it was cold out and other things were gping on so I just set everything aside until recently.
When I pulled out the drone last week, I couldnt remember if I'd replaced the props on it or not, but I remembered that when I did a few test flights last fall, that a couple of the props folded more stiffly that the originals. It was apparent when putting the drone in its case. I flew it again last week, still with the defective props. Then, a couple days ago, I found the boxes of new props.
Thats when I compared them and could tell that the new ones moved freely like my original ones, and thats when I came up with my theory that the defective ones were too stiff cuz fastened too tightly at the pivot point. I dont have anything from Skydio that says thats what the defect was, but I'm pretty sure thats it.