Tooltip for P279 shows URL instead of label

[graue70]

PREFIX wdt: <http://www.wikidata.org/prop/direct/>
SELECT DISTINCT ?item ?type WHERE {
  ?item wdt:P279 ?type .
}

If you hover over P279, it shows the URI <https://www.wikidata.org/prop/direct/P279>. If you replace the text P279 by the text P31 and hover over it, it shows "instance of"@en. This is inconsistent.