No docusaurus sidebar highlighting for elements with code blocks as the title

Created by: quetzaluz

Describe the bug

I have identified that this is likely not an issue with docusaurus as the default docusaurus sidenav highlighting handles code blocks fine with bold styling
When focused on a section where the title is a code block, the side nav does not show different styling or highlighting at https://create-react-app.dev/docs/running-tests [was highlighted over src/setupTests.js:

- This is an example of working highlighting for a non code title

Did you try recovering your dependencies?

Yes, N/A, issue repros locally

Which terms did you search for in User Guide?

N/A

Environment

Environment Info:

  current version of create-react-app: 3.4.0
  running from /Users/laluzc/repos/create-react-app/packages/create-react-app

  System:
    OS: macOS Mojave 10.14.6
    CPU: (16) x64 Intel(R) Core(TM) i9-9980HK CPU @ 2.40GHz
  Binaries:
    Node: 12.12.0 - /usr/local/bin/node
    Yarn: 1.19.1 - /usr/local/bin/yarn
    npm: 6.11.3 - /usr/local/bin/npm
  Browsers:
    Chrome: 80.0.3987.106
    Firefox: 73.0
    Safari: 13.0.5
  npmPackages:
    react:  16.12.0 
    react-dom:  16.12.0 
    react-scripts:  3.4.0 
  npmGlobalPackages:
    create-react-app: Not Found

Steps to reproduce

Browse the React App documentation and find a page where some sections are code for the title, ex https://create-react-app.dev/docs/running-tests
Scroll over that section
Notice no sidebar highlighting

Expected behavior

Sidebar section highlighting occurs like other docusaurus apps

Actual behavior

Notice no sidebar highlighting at top of report

Reproducible demo

Reproduced at https://create-react-app.dev/docs/running-tests

This is possibly related to the docusaurus 2 update, taking a bit of a look myself as well.