Flyout not working on safari and fire fox

Before the holiday rush in November we were able to get our site to rate 98% consistently on mobile and desktop systems with google speed index. Of course on January 1st Google changed the site and the rules. Now we are rating a 25% with obsoletely zero changes since November to our site.

The first thing we tried is to "remove unused CSS" from the site with WP rocket option. The only problem is that when this is done there is ONE issue. The tool bar menu flyout no longer works in Safari and fire fox. Everything works the same in Edge and google chrome. There is an option to bypass certain CSS with this option, we need to know what CSS controls the menu fly out so we can bypass that function when using the "remove unused CSS" feature.