Hey there,
On my sites I use the Hummingbird performance optimization plugin. It has an asset optimization feature that let’s you minify, combine, defer, delay, load asynchronously and move stylesheets and scripts to the header/footer. It works great, however it doesn’t pick up on the Google Fonts that are set via the Fonts Manager in Pro. Therefore I can’t optimize the fonts and prevent them from being render blocking resources.
The plugin’s devs think it may be due to Pro possibly not using standard WP enqueuing functions. Is that the case? I’ll provide login credentials in a secure note so you can investigate this issue.