The observations API does not return the position field for images.
For example, the observation detail API, e.g. https://www.inaturalist.org/observations/198979625.json returns a “position” field for each observation image, but no “position” field is returned by the observation search API, e.g. https://www.inaturalist.org/observations.json?order_by=observed_on&place_id=any&user_id=hueyl&verifiable=any&q=test&search_on=tags which means the images cannot be put in the correct order when using the latter API.
The observations search API should return the image position as well.
Platform (Android, iOS, Website): Website, specifically the JSON API