If a citation is used in the <poem> extension, Parsoid cannot integrate it with the global cite state of the page since it is expanded by the mediawiki parse API. This is an instance of T110909: Parsoid tripped up by extensions that process wikitext

Original bug description

https://en.wikipedia.org/api/rest_v1/page/html/William_Shakespeare/821432052 shows a portion of a reference list in the wrong location. It looks like it creates a new reference list right after where the reference is made.

Wikitext:

''And cvrst be he [[File:Middle English that.svg|Middle English that.svg]] moves my bones.''{{sfn|Schoenbaum|1987|p=306}}{{efn|In the scribal abbreviations ''ye'' for ''the'' (3rd line) and ''yt'' for ''that'' (3rd and 4th lines) the letter ''y'' represents ''th'': see ''[[thorn (letter)|thorn]]''.}}

Parsoid:
The text ends with references [1][a], followed by a portion of the notelist which should appear in the Notes section, plus the Cite error message: Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).
I'm aware that the Cite error message can happen but that doesn't explain why the ref counter starts over and a erroneous reflist just above the Cite error appears.

There is an {{efn}} template used, which happens to come right after a {{sfn}} usage, and in the Notes section the corresponding {{notelist}} template is used as well. So, the error message doesn't seem helpful in resolving this.

This is how it looks on Desktop.

In the Notes section Desktop shows the reference details for this: "In the scribal abbreviations ye for the (3rd line) and yt for that (3rd and 4th lines) the letter y represents th: see thorn.", whereas in Parsoid output this part is not shown. It seems to me that instead of that text the erroneous {{notelist}} portion "Schoenbaum 1987, p. 306." is shown in the middle of the page.

Not sure if this a Parsoid or a Cite issue.