I've been using e6 for a while and noticed a problem with it's interface. This issue has occurred on all Operating Systems, and the browsers I've used and it hasn't solved the problem. I've changed the font family and the issue doesn't go away.

Certain buttons, tabs, etc are showing the unknown empty unicode square, and I don't know what to do to fix it.
(Scrot I provided is an example/proof of the issue)
https://i.ibb.co/qrBdh5W/Screenshot-from-2022-06-06-00-14-49.png

I've used Firefox, Edge, Chrome, Chromium/Vivaldi/Opera, epiphany-browser (Ubuntu) on either Ubuntu, Debian/Raspberry Pi OS, Manjaro, Arch, Windows 10/11, iOS.

I've also used different computers, but I don't think that resolves the issue.

Looks like font-awesome did not load in properly.
Don't know what to tell you. Works okay for me on Firefox / Chrome with Windows 10 / MacOS.