Describe the bug

Changing the payment method on a pre-existing, active, subscription to a 3DS card doesn't work. After 3DS verification an error is displayed saying Error: no route was found matching the URL and request method.

To Reproduce

1. Make sure you have the latest version of WooCommerce subscriptions installed.
2. Make sure you have the latest version of WooPayments installed (issue confirmed in 8.1.1 and 8.2.1).
3. Create a simple subscription product (or use an existing one).
4. Add the subscription product to your cart, go to checkout, and pay for the subscription. I used 4242 4242 4242 4242 during my testing.
5. Go to My account → Subscriptions and view the subscription details for the subscription you just purchased.
6. Click Change payment.
7. When prompted add a new 3DS payment method. I used 4000 0000 0000 3220.
8. When prompted successfully complete the 3DS verification.
9. Observe the issue; the payment method will not be successfully changed.

Actual behavior

The payment method is not successfully changed on the subscription.

Screenshots

Expected behavior

The payment method is successfully changed on the subscription.

Desktop

• OS: [e.g. iOS] macOS
• Browser [e.g. chrome, safari] Arc (Chrome)
• Version [e.g. 22] 1.59.0 (53388) [Chromium Engine Version 128.0.6613.120]

Additional context

• 8.2.1 release thread: p1726190955933659-slack-CGGCLBN58