Smooth scroll + anchor does not work

Hello,

I used a link with anchor (example: #etage) in a hype animation.

I want to link the row that is upstairs below (One page site).

The link works well but it is very abrupt, no smooth scroll. On my site, the smooth scroll is ok with the links without animation hype

I used plugins like “Page Scroll too id” but it does not work.

How to get a smooth scroll from a Hype animation?
Thanks