Possibly caused by https://gerrit.wikimedia.org/r/c/operations/mediawiki-config/+/1093399 ... will take a look tomorrow / Monday.

Confirmed on a test server that this patch is the cause of that -- we'll investigate and fix OR revert that patch on Monday.

I can reproduce this locally with this wikitext:

{{#tag:poem|Text<ref>Name</ref>}}

{{#tag:poem|Text<syntaxhighlight lang='php'>$a=1</syntaxhighlight>}}

{{#tag:indicator|<templatestyles src="GeoData/styles.css" />''foo''|name=bar}}

If I set $wgParsoidFragmentSupport = 'v2'; in my LocalSettings.php, I get the HTML output:

<div class="poem" typeof="mw:Extension/poem mw:Transclusion" about="#mwt2" id="mwAg" data-mw="{&quot;name&quot;:&quot;poem&quot;,&quot;attrs&quot;:{},&quot;body&quot;:{&quot;extsrc&quot;:&quot;Text'\&quot;`UNIQ--ref-00000000-QINU`\&quot;'&quot;},&quot;parts&quot;:[{&quot;template&quot;:{&quot;target&quot;:{&quot;wt&quot;:&quot;#tag:poem&quot;,&quot;function&quot;:&quot;tag&quot;},&quot;params&quot;:{&quot;1&quot;:{&quot;wt&quot;:&quot;Text<ref>Name</ref>&quot;}},&quot;i&quot;:0}}]}"><p id="mwAw">Text'"`UNIQ--ref-00000000-QINU`"'</p></div>

<div class="poem" typeof="mw:Extension/poem mw:Transclusion" about="#mwt6" id="mwBA" data-mw="{&quot;name&quot;:&quot;poem&quot;,&quot;attrs&quot;:{},&quot;body&quot;:{&quot;extsrc&quot;:&quot;Text'\&quot;`UNIQ--syntaxhighlight-00000002-QINU`\&quot;'&quot;},&quot;parts&quot;:[{&quot;template&quot;:{&quot;target&quot;:{&quot;wt&quot;:&quot;#tag:poem&quot;,&quot;function&quot;:&quot;tag&quot;},&quot;params&quot;:{&quot;1&quot;:{&quot;wt&quot;:&quot;Text<syntaxhighlight lang='php'>$a=1</syntaxhighlight>&quot;}},&quot;i&quot;:0}}]}"><p id="mwBQ">Text'"`UNIQ--syntaxhighlight-00000002-QINU`"'</p></div>

<meta typeof="mw:Extension/indicator mw:Transclusion" about="#mwt10" id="mwBg" data-mw="{&quot;name&quot;:&quot;indicator&quot;,&quot;attrs&quot;:{&quot;name&quot;:&quot;bar&quot;},&quot;body&quot;:{&quot;extsrc&quot;:&quot;'\&quot;`UNIQ--templatestyles-00000004-QINU`\&quot;'''foo''&quot;},&quot;html&quot;:&quot;'\&quot;`UNIQ--templatestyles-00000004-QINU`\&quot;'<i data-parsoid=\&quot;{}\&quot;>foo</i>&quot;,&quot;parts&quot;:[{&quot;template&quot;:{&quot;target&quot;:{&quot;wt&quot;:&quot;#tag:indicator&quot;,&quot;function&quot;:&quot;tag&quot;},&quot;params&quot;:{&quot;1&quot;:{&quot;wt&quot;:&quot;<templatestyles src=\&quot;GeoData/styles.css\&quot; />''foo''&quot;},&quot;name&quot;:{&quot;wt&quot;:&quot;bar&quot;}},&quot;i&quot;:0}}]}">

I think the fragment support code probably has some missing support for the #tag parser function.

This is a bug in https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1088365/8/includes/parser/StripState.php ... which doesn't recursively process strip markers similar to what StripState::unstripType does.

Change #1123779 had a related patch set uploaded (by Subramanya Sastry; author: Subramanya Sastry):

[mediawiki/core@master] WIP: Process strip markers recursively in split

https://gerrit.wikimedia.org/r/1123779

Change #1123815 had a related patch set uploaded (by Subramanya Sastry; author: Subramanya Sastry):

[operations/mediawiki-config@master] Revert "Turn on Parsoid fragment support everywhere"

https://gerrit.wikimedia.org/r/1123815

Change #1123815 merged by jenkins-bot:

[operations/mediawiki-config@master] Revert "Turn on Parsoid fragment support everywhere"

https://gerrit.wikimedia.org/r/1123815

Mentioned in SAL (#wikimedia-operations) [2025-03-03T14:42:57Z] <ihurbain@deploy2002> Started scap sync-world: Backport for [[gerrit:1123495|Change license for Russian Wikinews to CC-BY-4.0 (T387279)]], [[gerrit:1123815|Revert "Turn on Parsoid fragment support everywhere" (T387608)]]

Mentioned in SAL (#wikimedia-operations) [2025-03-03T14:46:43Z] <ihurbain@deploy2002> matmarex, ssastry, ihurbain: Backport for [[gerrit:1123495|Change license for Russian Wikinews to CC-BY-4.0 (T387279)]], [[gerrit:1123815|Revert "Turn on Parsoid fragment support everywhere" (T387608)]] synced to the testservers (https://wikitech.wikimedia.org/wiki/Mwdebug)

Mentioned in SAL (#wikimedia-operations) [2025-03-03T14:54:37Z] <ihurbain@deploy2002> Finished scap sync-world: Backport for [[gerrit:1123495|Change license for Russian Wikinews to CC-BY-4.0 (T387279)]], [[gerrit:1123815|Revert "Turn on Parsoid fragment support everywhere" (T387608)]] (duration: 11m 39s)

A similar issue was also reported at https://en.wikipedia.org/wiki/Wikipedia:Village_pump_(technical)#List-defined_references_not_working_on_Android_app.

The article rendered like this in Parsoid at the time:

Now it looks fixed:

Change #1127076 had a related patch set uploaded (by Subramanya Sastry; author: Subramanya Sastry):

[mediawiki/core@wmf/1.44.0-wmf.20] Process strip markers recursively in split

https://gerrit.wikimedia.org/r/1127076

Change #1127076 abandoned by Subramanya Sastry:

[mediawiki/core@wmf/1.44.0-wmf.20] Process strip markers recursively in split

Reason:

The updated patch in master is now failing CI -- need to address that first.

https://gerrit.wikimedia.org/r/1127076

Change #1123779 merged by jenkins-bot:

[mediawiki/core@master] Fixes to "Parsoid Fragment Support v2"

https://gerrit.wikimedia.org/r/1123779

Change #1127076 restored by Jforrester:

[mediawiki/core@wmf/1.44.0-wmf.20] Process strip markers recursively in split

https://gerrit.wikimedia.org/r/1127076

Change #1127076 abandoned by Subramanya Sastry:

[mediawiki/core@wmf/1.44.0-wmf.20] Fixes to "Parsoid Fragment Support v2"

Reason:

We won't backport this. https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1127630 is also needed. So, we will just let them both ride the train. Then on Thursday, run rt-testing in Parsoid with this enabled, and then turn on v2 fragment mode the following week. So, we'll lose a week, but this has given us enough trouble that it is better to do a bit more thorough testing.

https://gerrit.wikimedia.org/r/1127076

Change #1130343 had a related patch set uploaded (by C. Scott Ananian; author: C. Scott Ananian):

[operations/mediawiki-config@master] Turn on Parsoid fragment support everywhere (take 2)

https://gerrit.wikimedia.org/r/1130343

Change #1130343 merged by jenkins-bot:

[operations/mediawiki-config@master] Turn on Parsoid fragment support everywhere (take 2)

https://gerrit.wikimedia.org/r/1130343

Mentioned in SAL (#wikimedia-operations) [2025-03-24T13:33:27Z] <tgr@deploy1003> Started scap sync-world: Backport for [[gerrit:1130343|Turn on Parsoid fragment support everywhere (take 2) (T374661 T380758 T389545 T387608)]], [[gerrit:1130560|Do not throw an exception after shared-domain login with no token (T362715)]], [[gerrit:1130561|Do not start central login from the shared domain (T362715)]]

Mentioned in SAL (#wikimedia-operations) [2025-03-24T13:37:04Z] <tgr@deploy1003> tgr, cscott: Backport for [[gerrit:1130343|Turn on Parsoid fragment support everywhere (take 2) (T374661 T380758 T389545 T387608)]], [[gerrit:1130560|Do not throw an exception after shared-domain login with no token (T362715)]], [[gerrit:1130561|Do not start central login from the shared domain (T362715)]] synced to the testservers (https://wikitech.wikimedia.org/wiki/Mwdebug)

Mentioned in SAL (#wikimedia-operations) [2025-03-24T13:54:09Z] <tgr@deploy1003> Finished scap sync-world: Backport for [[gerrit:1130343|Turn on Parsoid fragment support everywhere (take 2) (T374661 T380758 T389545 T387608)]], [[gerrit:1130560|Do not throw an exception after shared-domain login with no token (T362715)]], [[gerrit:1130561|Do not start central login from the shared domain (T362715)]] (duration: 20m 42s)

Change #1135499 had a related patch set uploaded (by C. Scott Ananian; author: C. Scott Ananian):

[mediawiki/core@master] Avoid strip markers in HTML when using {{#tag}}

https://gerrit.wikimedia.org/r/1135499

Change #1135499 merged by jenkins-bot:

[mediawiki/core@master] Prevent strip markers in HTML when using {{#tag}}

https://gerrit.wikimedia.org/r/1135499