Integers have no schema information and are returned (and shown) as floats

[graue70]

Example query:

PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX schema: <http://schema.org/>
SELECT DISTINCT ?astronaut_name ?sitelinks WHERE {
  ?astronaut wdt:P106 wd:Q11631 .
  ?astronaut rdfs:label ?astronaut_name .
  ?astronaut_node schema:about ?astronaut .
  ?astronaut_node wikibase:sitelinks ?sitelinks .
  FILTER (LANG(?astronaut_name) = "en")
}
ORDER BY DESC(?sitelinks)

The second result column used to contain values like '"3"^^<http://www.w3.org/2001/XMLSchema#int>' which was shown in the UI simply as 3.
Now, the values look like '3.000000' and are shown just like that, with six decimal zeros.

This seems like a bug to me. I can't find the commit where it was introduced, though, so I can't be sure it's not a feature.
Or was this changed in wikidata directly?

[graue70]

qlever recently (during the last week) switched to a new (third) behavior for integers, which is '3.0^^<http://www.w3.org/2001/XMLSchema#decimal>'.
Can anybody please comment on which is the expected result format? Why is the format changing so often?

[graue70]

The format went back to the original '"3"^^<http://www.w3.org/2001/XMLSchema#int>' at some point. I hope this is covered by some unit tests now.