Special symbols do not fall back to other fonts

[JoKalliauer]

Description

unsupported letters (e.g. ₂) are rendered as black squares instead of fall back to other fonts

Reproduce

Steps to reproduce the behavior:

1. Change the "Interface"-font on Linux to OpenDyslexic Regular

Screenshots

OpenDyslexic Regular (buggy behaviour)

Cantarell Regular (Expected behavior)

Systeminfo

• OS: Fedora 34
• Font: OpenDyslexic Regular

[peachjelly13]

I am getting a similar issue wherein I am trying to use OpenDyslexic in my chrome extension.
But the text doesnt look like OpenDyslexic font at all.
I cloned the OpenDyslexic repository and extracted all the font files present in compiled.
Could you please help, or do you think there is anything wrong that I have done.