A very helpful template has stopped working on enwiki. w:Template:If mobile, which allows for the addition of text that can be seen in mobile view when certain templates cannot be seen, no longer renders the text in mobile view. Was there something in this upgrade that made that template stop working? Paine Ellsworth put'r there 02:37, 15 April 2022 (UTC)
Topic on Talk:MediaWiki 1.39/wmf.7
Hiyo. I've pointed an Web Editing team dev towards your posts at Enwiki. Hopefully they'll know if there are any related back-end changes that were involved, or if the problem exists elsewhere.
(p.s. For future reference, these "release notes" pages aren't a good way to contact anyone! It's likely that only the creator (in this case me, but often a volunteer editor) is watchlisting them. The best location after first asking locally (e.g. VPT), is Phabricator. HTH.)
Still not working correctly.