My Hyvä Checkout customization broke, do you fix that?

Yes, Hyvä Checkout is one of our most-requested fixes. Custom steps, payment-method renderers and magewire components break for predictable reasons: a stale magewire snapshot (component snapshot checksum mismatch), a hydration mismatch between server and client state, or a renderer that never mounted because of a config typo. We reproduce the failing flow on staging, trace the magewire lifecycle, and fix the component without disturbing the rest of the checkout. See our Magento checkout bug fixing page for non-Hyvä checkout work.