`rgh-feature-descriptions` only works when opened in a new page

### Description

Navigate to the following file (e.g. via Go to file) vs opening it in a new tab, `rgh-feature-descriptions` only works for the latter

### How to replicate the issue + URL

https://github.com/refined-github/refined-github/blob/main/source/features/linkify-code.tsx

### Extension version

23.4.10

### Browser(s) used

Chrome