One of our courses uses the subscription system for its lessons. When you click a greyed out lesson, the popup to tell people they must subscribe appears but it's stays blank for 5.5 seconds before fully loading anything.
I notice it's the same on your demos e.g. https://learn.ijoomla.com/course/3-seo/3-joomla-seo
Is there any way to speed this up, or even add a loading icon?