Add Browser Cache support for WOFF2

Try adding this in your .htaccess at the very end:

# Custom directives for woff2; remove them if/when W3TC supports it
<IfModule mod_mime.c>
    AddType application/font-woff2 woff2
</IfModule>
<IfModule mod_expires.c>
    ExpiresByType application/font-woff2 A31536000
</IfModule>
<FilesMatch "\.(woff2|WOFF2|)$">
    <IfModule mod_headers.c>
        Header set Pragma "public"
        Header append Cache-Control "public"
    </IfModule>
</FilesMatch>
# end custom directives

This will make sure .woff2 files are served with the proper headers.