Wikidata recently rolled out ArticlePlaceholder tests on Welsh and Kannada wikipedias. Attempting to open these pages in the app, either via a search or deep-link, results in an error page.
https://kn.wikipedia.org/wiki/%E0%B2%B5%E0%B2%BF%E0%B2%B6%E0%B3%87%E0%B2%B7:AboutTopic/Q1459
https://cy.wikipedia.org/wiki/Arbennig:AboutTopic/Q2673