Menu heading doesn't show the arrow for submenu items

Hi

I'm not sure is this a Helix-Framework or a SP-Pagebuilder issue.
When a menu item is defined from menutyp "Page" and has some submenu items then the right arrow will be show. Thats fine.

However, if a menu item is defined using the menu type “Menu Heading” and has some submenu items, the right arrow is not displayed.

Any idea how to display the right arrow-sign also for menu type “Menu Heading”?

Thank you for support.