cashier-paddle: Coupon Code is not applied when using "withCoupon()"?

• Cashier Paddle Version: 1.0.0-beta
• Laravel Version: 7.13.0
• PHP Version: 7.4.5
• Database Driver & Version: MySQL 5.7

Description:

I’m trying to apply a coupon to a pay link by using the SubscriptionBuilder and the withCoupon()-method.

In my app, the checkout process looks like this:

1. User selects a planfrom a list of plans and adds an optional coupon code and submits the form
2. Controller builds PayLink and redirects user to Paddle (I’m not using the inline Checkout right now)
3. User completes checkout on Paddle and is redirected back to the app

However, the coupon code doesn’t seem to be applied. The price is not reduced and the user still has the option to add the coupon again by clicking “Add Coupon”. (The coupon is valid as it’s being applied when doing on paddle.com)

While debugging I’ve seen, that the coupon is available during the buildPayload-method call. The value is also still present before calling Cashier::post() here

I have the problem both with “Checkout” and “Product” Coupons.

Steps To Reproduce:

Build a paylink by using withCoupon().

$payLink = $user->newSubscription('default', $paddlePlanId)
    ->returnTo(route('home'))
    ->withCoupon('NAME-OF-COUPON')
    ->create();

return redirect($payLink);