Thanks Mike, I had no idea that lack of accuracy values affects so much of the database. I hope the developers can put this on their agenda - perhaps best to add other ideas to this thread.
In my case, the device is recording accuracy, which iNaturalist is reading when photos are uploaded via the site, but not when the same photos are uploaded using the app. This behaviour has changed recently - up until a month or so ago, the iNaturalist app would also read the accuracy values.