Hummingbird + Username

When the hummingbird plugin and its caching is active, i am not able to see part of the designs that i created using the Elementor page builder. When it is inactive, i am able to view my design changes. What do you think is causing this to happen? Is there a way to prevent it?

Also, i would like my WPMU DEV username to be changed, is there a way for me to change it in my account settings.