Redirect functions return response with body

[mehran13chartbox]

Link to the code that reproduces this issue

https://codesandbox.io/p/devbox/dreamy-driscoll-q59dlk?file=%2Fapp%2Fpage.tsx%3A5%2C57

To Reproduce

In a server rendered page I request to and api that respond with 308 status to redirect user to a new location. then I redirect to that location using permanentRedirect function from next/navigation. when I tested the url with curl in terminal I got a long body which should not return after redirect happens

to reproduce run this command in your terminal https://codesandbox.io/p/devbox/dreamy-driscoll-q59dlk?file=%2Fapp%2Fpage.tsx%3A5%2C57

Current vs. Expected behavior

curl localhost/path-that-has-redirect-with-external-api-response
it should return nothing in termanal however I got a big body in response

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 21.6.0: Mon Dec 19 20:46:01 PST 2022; root:xnu-8020.240.18~2/RELEASE_ARM64_T8101
  Available memory (MB): 8192
  Available CPU cores: 8
Binaries:
  Node: 20.9.0
  npm: 10.1.0
  Yarn: 1.22.21
  pnpm: N/A
Relevant Packages:
  next: 14.2.14 // Latest available version is detected (14.2.14).
  eslint-config-next: 14.2.14
  react: 18.3.1
  react-dom: 18.3.1
  typescript: 5.6.2
Next.js Config:
  output: N/A

Which area(s) are affected? (Select all that apply)

Navigation, Pages Router

Which stage(s) are affected? (Select all that apply)

next dev (local), next start (local)

Additional context

No response