Hiding menu bug | WordPress.org

We are currently developing 2 websites using the Ollie theme. We have noticed that when the menu should be hidden, the items of the mega menu are slowly dissapearing 1 by 1, not as whole.

Is this a known isssue or do you guys have any idea how to fix this?

• This topic was modified 4 seconds ago by coenz.

The page I need help with: [log in to see the link]