Discount Qty Applies to Mixed Attributes doesn't work

[siliconbug]

Just noticed the "Discount Qty Applies to Mixed Attributes" function doesn't work in v1.5.8a

Either "Yes" or "No" gives me the same incorrect result (no discount qty applied). I tested with PHP 7.4 and 8.0, but still didn't get the correct amount. Is there any possible setting conflict?

[swguy]

This works in master. Not sure if it was fixed in 2.0.x or 2.1.0.

[swguy]

Looks good in 2.0.1 as well.

[siliconbug]

It looks like a similar issue from https://www.zen-cart.com/showthread....even-though-th

So I copy the following codes (from v2.0.1) to \includes\functions\functions_price.php and insert between line 1417 and 1418:

if (IS_ADMIN_FLAG === false) {
$new_qty = $_SESSION['cart']->in_cart_mixed_discount_quantity($product_id);
// check for discount qty mix
if ($new_qty > $check_qty) {
$check_qty = $new_qty;
}
}

So far it works fine, and no error logs generated.
I would appreciate it if anyone could look into and verify my modification.