Also the css you refer to is completely wrong as it will show the basket icon on all products regardless of whether the single product has status outofstock or not.
A more correct css to use will be this one:
.single-product .outofstock .products .product-type-simple.instock .wd-add-btn-replace .add-to-cart-loop::before,
.single-product .outofstock .products .product-type-variable.instock .wd-add-btn-replace .add-to-cart-loop::before {
content: "\f123";
}Then the correct icon will appear in the product-grid if the single product has status outofstock.
The css itself explain the issue with woodmart very well, you should easily see the problem caused by woodmart when a single product has status outofstock.
As mentioned many times, the issue appear ONLY when single product has status outofstock. When it has status instock then everything works perfectly fine.
Rune
