On Polybar bitmap fonts and Ubuntu

I use polybar as my status bar in i3 and it's been going great for months now. However, I was recently grepping through the syslog trying to figure out why a browser crash happened and the log was filled with polybar spam that looked like this: polybar|warn: Dropping unmatched character. So I started picking at solving the warning.

Turns out there's a Github issue that contains the solution which is to enable bitmap fonts which I'll paste here for posterity:

# "Un-disable" bitmap fonts
sudo rm /etc/fonts/conf.d/70-no-bitmaps.conf
# Clear the font cache
sudo fc-cache -f -v

Apparently Ubuntu disables bitmap fonts by default but polybar uses bitmap fonts for icon rendering. I also needed to install the sijj icon font family which was painless.