This image took 57 attempts before it suddenly “worked”. I also tried cloning the same photo 100 times and dragging them all in. On average, 6/100 worked and the others were “insta-rejected” by the site.
It must be some weird connection thing. Is there a very short window for a lost connection to “time out” and just give up? As far as I know my connection is not bad at all and I’ve never had any interruption issues elsewhere, but I don’t see how else this could happen. The fact there is no real trend and it’s seemingly random must correlate to some amount of site use x internet connection of the PC.
Seems to be the same problem as my post here:
https://forum.inaturalist.org/t/retry-uploads-on-the-browser-uploader/34628/3