Need help with Add to cart button

Hi. I need help with my store mobile version.

I am using the sticky panel but when you move the page down the Price and Add to Cart button that must appear over the Sticky panel is not showing it properly.

My website is to see the error you must do it on a mobile device and go to a product page.
I will appreciate any support.

Is there any configuration without code that can be affecting the bar behavior? I have some codes in the CSS to modify some website behaviors.