Upload screen goes blank, makes partial + incomplete upload

Platform: Website

Browser: Firefox

URLs (aka web addresses) of any relevant observations or pages: https://www.inaturalist.org/observations/upload

Screenshots of what you are seeing:

a genuinely blank screen without so much as the logo etc on the upload page

…and then this is why My Observations looks like (there should be ~3x more observations, and they all had photos)

Description of problem :

On the upload screen, I submitted observations and waited for them to upload.
A pop-up came that asked if I wanted to continue without uploading or “stay and keep trying” or something (not verbatim obviously; I’ve never seen this pop-up before so I hardly know what it said); I clicked the stay option and it just suddenly went blank.
Most of the observations did not upload, and it partially uploaded several with text information but not the photo that was attached to them.