Debut drop down menu on mobile does not work.

[SvendeJong01]

Could somebody help me with this problem?

The dropdown menu on mobile does not work properly. See link to screen recording attached: 

https://youtube.com/shorts/ZN3vtANJzFI?feature=share

On the edit page on Shopify it does work, but not on mobile. If you turn the phone horizontal it does work but not vertical. 

The URL of my website: https://shop.nautim-me.com/