Hello,
I noticed today a major problem on my Wikibase-cloud project with respect to a particular sparql query (see below). After using WikibaseIntegrator to bulk create about 300,000 items all having a specific 'instance of X' statement, a sparql query that tried to retrieve those items on the basis of that 'instance of X' statement failed to retrieve any of them. It isn't a problem with the query syntax since changing X to another item Y yields proper results. The item X is retrievable via its Qid and label in the main search box. Does anyone have experience with this problem or know what is going on?
Query: