Last non-documentation code change was https://gerrit.wikimedia.org/r/#/c/319911/ nine months ago. Has it been broken for that long without us noticing or is it more recent?

In T171389#3684094, @Jdforrester-WMF wrote:

Last non-documentation code change was https://gerrit.wikimedia.org/r/#/c/319911/ nine months ago. Has it been broken for that long without us noticing or is it more recent?

@Jdforrester-WMF very likely already broken for that long. It's not a page that too many people keep an eye on, and more casual readers might just think it's 'weird' instead of broken.

Lol, no it's simple:

<div class="mw-parser-output">13 Oct. 2017</div>

So it's because it inserts random pieces of parser-output into the line.

Change 384173 had a related patch set uploaded (by Bartosz Dziewoński; owner: Bartosz Dziewoński):
[mediawiki/extensions/CiteThisPage@master] Suppress wrapping <div class="mw-parser-output"> around our <citation> tags

https://gerrit.wikimedia.org/r/384173

Change 384173 merged by jenkins-bot:
[mediawiki/extensions/CiteThisPage@master] Suppress wrapping <div class="mw-parser-output"> around our <citation> tags

https://gerrit.wikimedia.org/r/384173

In T171389#6103871, @jhsoby wrote:

I'm seeing this exact issue now, e.g. on https://en.wikipedia.org/w/index.php?title=Special:CiteThisPage&page=Nauru&id=954769756&wpFormIdentifier=titleform . Some form of regression? Seems like the <citation> tags get converted to <p>. (What kind of tag is <citation> anyways? I can't find any documentation for it, the closest I can find is HTML5's <cite> tag, which is meant for work titles. Probably the best solution is to just remove those tags from enwiki.)

This is a new issue: T250807. Basically, on enwiki, the <citation> tags are enclosed within {{#time}} function and the function comes with <p> tags.