Anchors not working properly: scrolling only down

Hello all,
i have a problem with achor menu. I have several sections that are all sticky to top with offset 20% . Every section have anchor.
I made buttons at the top section with buttons leading to every one of the anchors.
When i press any button at first it leads me to the correct section, and when i press another button that leads to section below current it works ok. The problem is when i press a button that leads to section above current it doesn’t move up. It stays at the current and move a little down…
What am i doing wrong please …?

Regards
Product:
Wix Studio