CSS variables don't work in version 13 minified on CDN

[tyler-vs]

This affects button styles, ect.

I reduced the test case on the following pen: https://codepen.io/tvs/pen/LYvVqQY

Error seen in DevTools:

If you copy and paste the minified file in a Text Editor it will show a hidden character before :root in the file. It looks like <0xfeff>.

[cferdinandi]

Oh weird! Thanks for this!