Landio theme: Menu jumps on modular page dosen't work

I love the landio theme, but I still have basic problems: I editet my contect but the menu jumps down the page dosen’t work. i.e. the 01.home/_video/ file:

title: video
published: true
visible: true
hidemenu: false

the link does not jump to the video section of the modular page.

What could be wrong?

P.S. I just made an test with landio standard theme: the jump works i.e. for _features but not for _video. What is the difference?