recurring shipping inconsistency checkout shortcode vs. blocks

[WillBrubaker]

Describe the bug

In 658783-zen a WooCommerce Subscriptions user points out that users are able to select separate shipping methods for the initial shipment and the recurring shipment. This differs from the behavior with the shortcode checkout.

To Reproduce

1. Compare the difference in shipping when more than one shipping method is available on shortcode vs. block checkout

Expected behavior

This user wants the block checkout to behave like the shortcode. This also seems likely to cause problems with payment gateways that don't support recurring amount changes.

Actual behavior

Separate selections for initial and recurring shipping methods.

Product impact

• [yes ] Does this issue affect WooCommerce Subscriptions? yes/no/tbc, add issue ref
• Does this issue affect WooCommerce Payments? yes/no/tbc, add issue ref

Additional context