I wanted to point out phab:T212610 here. Basically, because of a long-known iOS bug (or anomaly), CSS tooltips remain sticky on mobile devices. Apparently, the mobile version (.m domain) is able to handle the problem well; the iOS app however behaves just like the desktop version. I feel like that should be fixed quickly, after all it is specifically the iOS app!
Topic on Talk:Wikimedia Apps
I've added the ticket to the iOS app bug project on Phabricator.