In the example you gave you just would need to reidentify as Desmia (genus) and select the disagreeing ID option (as I did).
I agree it’s not ideal and needs to be fixed. See this related feature request I made: https://forum.inaturalist.org/t/search-by-observation-taxon-or-community-taxon/3620
The team of developers at iNat is small and they can’t fix everything immediately to everyone’s satisfaction, so some issues definitely go by unaddressed for a while.