Firstly, I love your plugin. It makes an incredible difference to my site load speeds. I hope you can help me with a couple of problems that I am encountering, that I have definitely isolated to your plugin.
The two themes that are affected, are the ThemeForest Avada and Enfold themes. Both themes use a sticky menu and a modal search pop-up (this appears to be a consistent factor). Both of these pieces of functionality break when WP Defer Loading is activated, and the following errors are displayed through Chrome:
Avada: Uncaught SyntaxError: Unexpected token .
Enfold: Uncaught SyntaxError: Unexpected token ILLEGAL
It goes without saying that this functionality works with no error when WP Defer Loading is deactivated.