Call to createPaymentMethod still uses previous publishable key after new publishable key is set on Stripe instance with applySettings().

[moony-baby]

This is similar to this issue, but for the publishable key.

The following will create a payment method in the account with publishable key pk_test_xxx:

Stripe.publishableKey = "pk_test_xxx";
await Stripe.instance.applySettings();

Stripe.publishableKey = "";
await Stripe.instance.applySettings();

final paymentMethod = await Stripe.instance.createPaymentMethod(
          params: PaymentMethodParams.card(
        paymentMethodData: PaymentMethodData(
          billingDetails: billingDetails,
        ),
      ));

To me this behaviour is unexpected, as I would expect the API call that creates the payment method to use the new publishable key (i.e. the empty string).

When you inspect Stripe and Stripe.instance after the second applySettings(), the publishableKey property is blank as expected, but clearly this does not apply to the API call, as the payment method is successfully created.

I would expect no payment method to be created, as the Stripe instance has an empty publishable key.