vertical-front-matter: only works on first load after cache clear

[simon-abbott]

Description

vertical-front-matter only works on the first load after the extension cache has been cleared. On all further loads it simply does nothing with no console errors.

Screen.Recording.2023-09-01.at.4.35.40.PM.mov

How to replicate the issue + URL

https://github.com/github/docs/blob/main/content/repositories/working-with-files/managing-files/customizing-how-changed-files-appear-on-github.md

Extension version

23.8.24

Browser(s) used

Firefox

[fregante]

Thank you for the report! This is due to:

• React-based views don't correctly update features #6554

[fregante]

On second look, I don't know what's causing it. Cache shouldn't be an issue here, it's likely a race condition because there's no "await dom ready" in the feature.

PR welcome to rewrite it using our selector observer