List of steps to reproduce (step by step, including full links if applicable):

• Go to a random category on zhwiki (example)
• Set language variant to anything except "不转换" (zh)

What happens?:
You will see the section header of pages inside this category looks like "分类“分类:自然科学”中的页面"
qqx: (category_header: 分类:自然科学) (link)

What should have happened instead?:
It should display like "分类“自然科学”中的页面"
And corresponding qqx: (category_header: 自然科学) (link, this is variant "不转换", zh)

Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc.:
1.38.0-wmf.22 (529f223)