We previously were running vercel alias in CI to alias our preview deploys to a specific URL. The CLI is returning the same response as usual:
Vercel CLI 37.5.3
> Assigning alias subdomain1.example.com to deployment subdomain2.example.app
Fetching domain subdomain1.example.com under org-slug
Creating alias
> Success! https://subdomain1.example.com now points to https://subdomain2.example.app [1s]
and yet inside of vercel, the domain is not assigned and it doesn’t not go to the correct build. This used to work but seems to have stopped working.
Thanks for letting me know! If you can share an example deployment URL and custom domain on that ticket, it will help your support engineer investigate more quickly.