With this change: https://github.com/Shopify/shopify-frontend-template-react/pull/255/files#diff-0eb547304658805aad788d320f10bf1f292797b5e6d745a3bf617584da017051R20

It is supposed to insert the %VITE_SHOPIFY_API_KEY%, but not matter what I try this isn't inserted. When I run the build command it works fine and my key gets inserter, but in dev it doesn't get replaced. This causes all fetch() calls to just stop working and not do anything. I don't get errors, I don't get warnings, I don't get logs, I don't get http calls.

How am I supposed to get this to work in dev mode? The documentation doesn't specify anything, and there's nothing in the migration guide for this change.