Is cascade broken?

I cascaded a description in a section’s _index.md and _index.de.md files a long time ago, but it is broken in the latest Hugo versions. The site is multilingual, and the secondary language shows the cascaded description from the primary language. When one description is removed, both languages inherit the one left in either.

<meta name="description" content="{{ .Params.description }}">
cascade:
  - params:
      description: A long wire cord

See https://github.com/gohugoio/hugo/issues/14310