seems like you’ve asked this kind of question before. see: https://forum.inaturalist.org/t/how-to-refresh-map-to-show-observations/25339/11.
this observation might just need to be updated slightly to get reindexed or something like that (similar to what probably happened here: https://forum.inaturalist.org/t/cant-see-certain-observations-by-other-people/12763/19).