Animation not triggering on tablet/mobille device

Hi guys,

I am encountering an issue with an animation that is not triggered on tablet/mobile.

I have created an animation when scrolling into view of a bar/highlight sliding under the main titles of the page. (see the screenshot attached)

It works fine on desktop but not on tablet and below.

For some reason it only works in the " PÉNINSULE D’OSA" section on tablet but I cannot figure out why…

Anyone knows how to fix this ?

Many thanks !


Here is my site Read-Only: