fontawesome icons are not rendered correctly in status bar

[guoqiao]

Example code:

Status bar:

As you can see, the fontawesome wifi icon is mis-renderred to a bell icon. However, emoji is working fine.
This happens to other fontawsome icon as well.

[guoqiao]

After some debuging, I realized the issue is not from this repo, it's the i3bar command not handling it correctly.
I will still leave it open for more discussion, e.g.: how to add icon to bar correctly.
Feel free to provide your solution, or close this issue.