Content collection MDX styles missing from prod builds for non-page components

[bholmesdev]

What version of astro are you using?

2.0.6

Are you using an SSR adapter? If so, which one?

None

What package manager are you using?

npm, pnpm

What operating system are you using?

Mac

Describe the Bug

When using content collections, MDX styles are missing in production builds when rendering from a non-page .astro component.

1. Create an MDX content collection entry
2. Import styles from that entry
3. Try to render that entry from a component that is not the src/pages component (any level of nesting will work).
4. Notice styles are present in dev, but not production build previews.

Link to Minimal Reproducible Example

https://stackblitz.com/edit/github-jjdbqw?file=src/components/UsingMdx.astro,src/content/blog/using-mdx.mdx,src/pages/index.astro

Participation

• I am willing to submit a pull request for this issue.

[bholmesdev]

Note the above example includes a hoisted script test as well. Hoisted scripts are correctly included, but I left this in for testing after the hoisted script PR goes in!