I noticed a bug on checkout with the generated advanced v2 modules on checkout when a 100% discount coupon is applied and a shipping method is selected. The main issue is the payment method options disappear once you select any shipping method.
FYI This is on a local build with bricks builder installed and no other active plugins
I can’t replicate that issue locally. I think it would be best if you can send me an access to the staging website so I can take a look or if you can replicate it on try.bricksbuilder.io.