What is the difference between ntl dev --live and what's deployed through Netlify?

[kylesloper]

The basis of dev --live is that you can quickly share a site with other devices/people without deploying. To my knowledge, redirects do not work in --live mode which I think is the reason you are experiencing this issue.

See this post here

Redirect with dynamic URL variables possible?

Yup, as Luke said, we won’t be able to do that natively here - redirects are static at deploy time, and I don’t think you have a full list of hostnames. If I’m wrong and you do, feel free to make one redirect per name, like this: https://luke.fbx.im/whatever https://app-luke.fbx.biz/path 301! Otherwise you’d best be served by a function that can parse the original host header, or some other dynamic solution.