Multicurrency - Price based on Country plugin - Cart is not refreshing the availability of the button

[ChristianAF]

Describe the bug
On Cart page when updating the address the button availability is not been refreshed. for example: Amazon only accepts EUR. But "Priced based on Country" settings allows USD also for United States only. When address is changed from Europe to on on US, the button still available, but should not.

Amazon V2 settings:
wc-amazon-pay-settings-export-03-26-2021.zip

Price based on country settings:

To Reproduce
Steps to reproduce the behavior:

1. Add product to cart
2. Go to cart and change address from Europe to US or US to Europe
3. Depends on the Test: if change Europe to US the button should disappear, if change from US to Europe, button should appear

[ChristianAF]

On Checkout is another Issue with Price based on country.
if you select US Address on shipping you are able to place order, but it redirects to checjout again. with no errors: