Bad number of pages count in a category
From semantic-mediawiki.org
Fragment of a discussion from Help talk:Count format
I have also seen it on one particular query, [0] suggests a patch and it would be great if you could apply/test/verify this before we make an effort to push this into the master branch.
[0] https://github.com/SemanticMediaWiki/SemanticMediaWiki/issues/1301