I used the wordpress template to deploy a project, everything works well on the railway subdomain.

I configured my custom subdomain using Cloudflare like I usually do for my other projects. I get the setup complete message, all good.

However, when I delete the railway subdomain, the app stops working. And currently, the custom subdomain is redirecting to the railway subdomain. What's going on? How can I access the app without the railway subdomain, and only using my custom subdomain? I tried multiple times to reset the dns records and can't make it work.

Thanks for your help!