Redirect after Spark (v2.3.4 — STRIPE) creates a new subscription

What is the best way to redirect after a new subscription is created with the latest version of Spark?

Our use case is that we allow users to register without a card upfront, but still select a plan. We've already overriden the RegisterResponse to handle the redirect to /billing after the account is registered.

Now we would like to redirect back to the dashboard when a new subscription is created, rather than staying on the billing page.

Following the same approach as overriding the register response, we've tried adding this to SparkServiceProvider:

public function register()
    {
        $this->app->singleton(
            \Spark\Contracts\Actions\CreatesSubscriptions::class,
            \App\Actions\Spark\CreateSubscription::class
        );
}

This does indeed allow us to override the CreateSubscription action. However, returning a redirect from this action doesn't do anything (the parent logic is executed and the subscription is created, though):

class CreateSubscription extends CreateSubscriptionBase
{
    use HandlesPaymentFailures;

    /**
     * @inheritDoc
     */
    public function create($billable, $plan, array $options = [])
    {
        parent::create($billable, $plan, $options);
        return response()->redirectTo('/dashboard');
    }
}

Going a step further, we tried overriding the NewSubscriptionController as well; this too did not produce the intended result.

Finally, after looking at the BillingPortal Vue component in Spark's source, it appears there is no way to handle a redirect response:

/**
         * Handle a payment response and optionally redirect to the payment page.
         */
        handlePaymentResponse(response) {
            if (response && response.data.paymentId) {
                window.location = '/' + this.$page.props.cashierPath + '/payment/' + response.data.paymentId + '?redirect=' + window.location.origin + '/' + this.$page.props.sparkPath;
            } else if (response) {
                this.reloadData(['nextPayment', 'plan', 'receipts', 'state', 'trialEndsAt']);
            } else {
                this.processing = false;
            }
        },

Any feedback here is greatly appreciated! Thanks!