Circa since 16 January 2019, the "Special:NewItem" form (opened through the "Add links" link in the interwiki section of the left menu) get frozen when a Wikimedia Commons category page should be joined with a Wikipedia article which have not its own Wikidata item yet. Tested on Category:Rabštejn (Hanušovická vrchovina). As "Link with page" button is clicked, the form works and works and works and never finishes.