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drilldown data-auto-height on submenu not working in foundation 6.4.1

I made a responsive topbar as i dit in 6.3. Horizontal dropdown on medium and large. Drilldown on small. As always i added data-auto-height. In Foundation 6.4.1 hower when navigating to a submenu, only the back-button is visible.

Can somebody help me out. 

 

drilldown menu 6.4

I made a responsive topbar as i dit in 6.3. Horizontal dropdown on medium and large. Drilldown on small. As always i added data-auto-height. In Foundation 6.4.1 hower when navigating to a submenu, only the back-button is visible.

Can somebody help me out.