I usually take multiple pictures of each observation to highlight various features/various angles using my camera app and upload later. (my phone reacts too slowly to take pictures directly through the app) From time to time my phone fails to log the location on an image, and when I upload multiple pictures the app (I think) looks for location data in the first image and seeing none, marks no location. I have to go back and reselect different images as “first” image until I find one with location information.
Looking at multiple pictures for location might also flag observations where inexperienced users upload unrelated pictures. It could trigger a notice along the lines of “Your observation appears to contain pictures from multiple locations. Pictures of seperate organisms should be uploaded in individual observations”