Search generates taxon results, but they point to /null

Never seen this before, but if you do a search for the genus Afromatispa, using the search bar, it will return two apparently ungrafted results, but if you hover over the about link it points to /null, and clicking them leads to the default taxa page.

I’ve not seen this behaviour before. Are they there or not, have they been deleted but remain searchable somehow ?

I also get a whale shark if I actually commit the search:

No active or inactive taxa are found on the taxa-specific search:✓