Suggested Price is one of the very few settings that, when added or changed, requires you to copy new Add to Cart button code for that item to paste into your site. This is because the Sug. Price is applied by adding an extra parameter (&amount=) in your button's href= URL, which boosts the item's Min. Price by a certain amount when that item is added to a buyer's cart.
(BTW, Item Number and Variants/Variations are the only other settings that would alter an item's Add to Cart button code.)