Navbar shrinks when opening dropdown menu

Hey ya’ll, I have a small issue with my nabber. When opening the dropdown menu (hamburger menu) the main navbar content seems to shrink to the left side of the container. Everything’s set to “not shrink” so I can’t really tell why this is happening.

This is the moment the hamburger menu is being pressed:

Here is my site via read only:

Any help is highly appreciated :slight_smile: