Thanks Paul. I commonly use the camera app to take photos and then upload them as observations, and this method certainly provided an accuracy value until very recently. Perhaps there has been a change to the way that the iPhone camera app records accuracy, although I have not updated the iOS in recent days. The problem is reproducible.
To add some more info, if I make an observation within the iNaturalist app, it records an accuracy value. If I take a photo with the default iPhone camera app and then use that photo to create an observation, the accuracy value is 0. I believe this behaviour has changed within the last week or so. If I take a photo in the iNaturalist app and then pull it from “all photos” to make an observation, it comes with an accuracy value. I am therefore reasonably confident that this is an Apple bug, not an iNaturalist bug. Nevertheless, it’s one with serious repercussions for iNaturalist, as it means many observations made from now on will lack accuracy values.
I am using an iphone 5s, iOS version 12.4.1, and iNaturalist version 2.8.1, build 538. I will try updating the iOS to 12.4.2 and see if that helps. Update: it doesn’t. Problem persists in iOS 12.4.2.
I would be interested to know if others can replicate this issue.