There are constraint violations being shown which are not actually violations, caused by Unicode characters not being matched correctly. This applies to both Special:ConstraintReport and the icons shown on entity pages.
Examples:
- https://www.wikidata.org/wiki/Special:ConstraintReport/Q339603 (SPARQL query)
- https://www.wikidata.org/wiki/Special:ConstraintReport/Q24886355 (SPARQL query)
- https://www.wikidata.org/wiki/Special:ConstraintReport/Q106259494 (SPARQL query)
- https://www.wikidata.org/wiki/Special:ConstraintReport/Q2618461 (SPARQL query)