Hamburger menu stays like a cross

Hello, I have an issue with my hamburger menu on phone. I’m sure it’s an easy trick but I can’t do it :
When you click on the menu, it becomes a cross, and the drop-navbar shows.
When you click on the cross, it becomes an hamburger menu back, and the drop-navbar hides.
When you click outside the drop-navbar, it closes (normal) but the menu stays a cross, and doesn’t come to the normal state, an hamburger menu.

I had to put a 3sec delay to the cross coming back to a an hamburger, but it’s not what I want.

Here is my read-only link: Webflow - [ORALNUM] Landing Page / L'Agence LP)