Is it the actual compare-at-price, or an automatic discount.
A native automatic discount does not exist until something is in the cart.
Respect others time always provide a direct link to an example of the issue don’t make them dig.
It has nothing to do with the homepage so link to a product “on sale”
Be very clear in the terms used and describing how you have things setup.
Unclear communication is an extremely costly business habit if not improved.