I just made a comment on an Observation, and then a few minutes later found another Observation that has been IDed in a helpful way where I might be able to hazard a guess about the first. But I can’t find the first Observation again! I didn’t ID it or favourite it, so the only thing I have to go on is I recently marked it as reviewed, and left a comment.
In the identify modal, you can click on the “reviewed” checkbox at the top, and it will show you the latest reviewed observations… just work back through those until you recognise it?