Element stuck to the top issue.

Hello,

I have a little banner on my website that is supposed to be stuck at the top (just under the menu section). It's a global element so it should be exactly the same everywhere on my website.

I just discovered that for some products this little banner doesn't stick to the top the way it should be. I really don't understand why it does stick for some products and it doesn't for some other

Inspecting the code, I noticed the following differences:

Products where it sticks nicely: (page example: https://greenbeautysquare.com/boutique/serum-visage-nourrissant/)

et_pb_section et_pb_section_1 et_pb_sticky_module et_pb_with_background et_section_regular et_pb_sticky et_pb_sticky--top

élément {
position: fixed !important;
padding: 0px !important;
z-index: 10000;
width: 1440px;
left: 0px;
top: 75px;
bottom: auto;
margin-top: 0px;
}

Products where it doesn't stick: (page example: https://greenbeautysquare.com/boutique/routine-peaux-sensibles-et-reactives/)

et_pb_section et_pb_section_4 et_pb_sticky_module et_pb_with_background et_section_regular

élément {
}

Do you have an idea how to fix this so that my banner sticks all the time?

Many thanks for your precious help,

Géraldine