Website
Firefox Version 82.0 (64-bit)
https://www.inaturalist.org/observations/identify?iconic_taxa=unknown&order=asc
(with New Jersey filter also applied, but I doubt that changes anything)
https://www.inaturalist.org/observations/33486797
Step 1: add comment to observation
Step 2: very quickly (while comment has not yet appeared / is loading), hit i , p, enter , enter…
Step 3: whoops, the comment was copied and now appears twice.
as you can see, the comment did save twice, not a visual error.