On desktop, the menu is not hidden and is always visible.
The width of the menu element overlaps to the right into the content area.
On mobile, the menu protrudes slightly into the visible area from the left.
Tried to find CSS related problems, but I wasn't successful. Downgrading to version 3.2 fixes all problems.
Tested with two different Contao installations (Contao 4.9 and Contao 4.13).
Test on desktop: Brave browser (latest) and Firefox (latest).
Test on mobile: Brave browser, Android 13.
Version 4.01 has some issues:
Tried to find CSS related problems, but I wasn't successful. Downgrading to version 3.2 fixes all problems.
Tested with two different Contao installations (Contao 4.9 and Contao 4.13). Test on desktop: Brave browser (latest) and Firefox (latest). Test on mobile: Brave browser, Android 13.