Main menu not usable on mobile

[Tiim]

When on mobile the main menu seems to behave very weirdly since the v4 update.
My website is currently on version 4.0.5.

When in FullScreen and Sidebar menu style layout setting and when tapping on a submenu item on mobile instead of opening the page all the items from the submenu move to the next submenu below somehow.

In Dropdown mode the menu closes itself when trying to scroll down.

It is unfortunately not really possible to use the menu like this on mobile.

I attached a little video on how it looks for me.

FullScreen/Sidebar:

Dropdown: