Callback dont work with credentials provider (infinite loading)

Provider type

Credentials

Environment

"next": "14.0.4",   
"react": "^18",
"next-auth": "^4.24.5"

Windows
Node 20.10.0
Browser: Brave and Chrome

Reproduction URL

https://github.com/omatheusant/ismafer-pages

Describe the issue

I created a simple custom login page using credentials provider to my enterprise webapplication, its working correctly but i'm having a bug that affects the user experience when I try to do the login in my deployment at vercel: https://ismafer-pages.vercel.app/
When I make the login with the right credentials, the page still loading infinite and nevers execute the callback to the "/", but when I reload the page and put the credentials again it works fine and make the push correctly

i try to use the callbackUrl but doesnt work, so I try to use useRouter to make a push and im still having the asme issue.

How to reproduce

1. Open https://ismafer-pages.vercel.app/ (deploy)
2. try login with credentials (username: ismafer, password: admin123);
3. you'll see the loading infinite
4. refresh the page
5. try again with the credentials and works correct

Expected behavior

just the callback work correctly at the first time the user try to make the login

Start with the custom login flow in the reproduction repository and compare its deployed behavior at ismafer-pages.vercel.app with the reported local or first-attempt flow. Trace the credentials sign-in and callback handling, then verify that the first valid login completes navigation to "/" without infinite loading.