I'm developping a website and I have the following issue:

I am using version 5.1.1 of WordPress with the latest version of the Phlox theme and the Elementor page builder version 2.5.10.

I use the vertical menu. The menu doesn't show on mobile. The hamburger menu appears but when you click on it, the menu does not appear. It works fine on a full desktop screen or tablet. I set it as primary menu but this did not resolve the issue.

It did work with another header layout (horizontal).