What version of Hugo are you using (hugo version)?

v0.146.3

Does this issue reproduce with the latest release?

Yes

Problem

My site is in Russian and English. The default language is Russian (defaultContentLanguage = "ru").

Files:
/partials/comment.ru.html
/partials/comment.en.html
/partials/comment.ru.xml
/partials/comment.en.xml

Fragment from the template /layouts/_default/single.html:

{{ partial (print "comment." (default "ru" .Lang) ".html") . }}

In version 0.145.0 everything was fine, but after the update it always displays only partial en (comment.en.html). Even in RSS I see comment.en.html (instead of comment.ru.xml or comment.en.xml).