I have apple pay on the web running ok on our website, using ios devices When I load the cart in a browser and try using the 'scan now qr code', my pay sheet displays on my iphone and then immediately closes. How can I debug the issue? I'm not seeing any logging or issues.

When apple pay on the web does a onshippingcontactselected it appears to truncate the zip code. If I enter: 11111 or 11111-1111 I always get 11111. Is there any way to get the plus 4?