Steps to replicate the issue:

• Go to Russian Wikipedia. Make sure that your skin is other than Vector (2010), otherwise go to preferences page and change the skin, e. g. to Vector (2022)
• Open edit form on any page (you can use local Wikipedia:Sandbox for this purpose)
• Include Special:RecentChanges or Special:RecentChangesLinked with any set of parameters to the page. Sample code:

{{Special:RecentChangesLinked/Категория:Статьи проекта Компьютерные игры}}

• Publish the changes or click on "Preview" button.

What happens?:
Saved/previewed page is being rendered using deprecated Vector (2010) skin. Other pages are continued to be rendered normally. Refreshing or null-editing the page might randomly fix the issue.

Other information:

• I reproduced this issue in Russian, Ukrainian and German Wikipedias, but I failed to reproduce it in English Wikipedia. Might be related to FlaggedRevs?
• This issue seems to be independant of interface language. I reproduced it using both Russian and English interface language in Russian Wikipedia.
• Seems like the arguments you pass to the page have no effect at all. E. g. the issue still persists if the page you're trying to get linked changes for is nonexistent.