Hello,
I just processed some test on your website, and I can see that there is something strange, now what's the root of this issue ?
In order to go forward can you :
- Test this with a default template like (ProtoStar), if that solve, issue is in your override view.
- Provide payment method configuration WITH restrictions part (if you have define some of them).
- Process same test in Legacy checkout AND new checkout, see if results are different ?
Awaiting news from you, with precise elements return.
Regards