Onpage navigation with anchors – sometimes it scrolls, sometimes it jumps

Hello enfold-team.

i have a Problem. i´m restructuring our page and want to organize sites with a onepagedesign and anchor-points. I reorganized the menu and most of it works fine.
But there is a different behavior of the anchor-points.

To some anchors it scrolls to the right position. But to other anchors the site jumps and the position is too low.

Can´t find the difference and a way to fix it.

It should scroll to all anchor points.

Here is the site:

https://www.photoart-huebner.de/infos-preise/hochzeitonepage/

This for example works right:
https://www.photoart-huebner.de/infos-preise/hochzeitonepage/#Reportage

it scrolls and the header is shown.

This for example is wrong:
https://www.photoart-huebner.de/infos-preise/hochzeitonepage/#Getting%20Ready

it jumps and the header is not shown

Best regards

Marcus