Markdown codeblocks / backticks are indistinguishable

[Mikaela]

Describe the bug

When typing/reading multiple backticks ` in a row, they become invisible causing problems typing markdown.

To Reproduce Steps to reproduce the behavior:

1. Open https://guides.github.com/features/mastering-markdown/#examples with the browser extension loaded
2. Click on Code
3. Read how to type codeblocks in GitHub flavoured markdown.

I am also able to reproduce this on Pluma (MATE fork of Gedit) when I set the font as OpenDyslexicMono Regular.

Expected behavior

Backticks are clearly visible.

Screenshots

• 
  • With the extension on the third line the backticks have become accented characters. This looks like https://github.com/OpenDyslexic/opendyslexic-chrome/issues/33.
  • The multi-line codeblocks called as fencing are all merged to one.
• 
  • Without the extension backticks and fenced codeblocks come visible.

Desktop (please complete the following information):

• OS: Fedora 34
• Browser: Microsoft Edge Beta
• Version: 93.0.961.33

Additional context

I am not personally dyslexic while I am happily surprised to be able to read OpenDyslexic a lot faster than I usually read and I hope this report is helpful regardless.

[2-www]

not reproducible in gnome text editor on debian