redirect does not work when using multiple root layouts

[llipengda]

Link to the code that reproduces this issue

https://github.com/llipengda/next-redirect-bug

To Reproduce

1. next dev
2. click /test-a
3. click redirect to /
4. the page is navigated to /
5. click /test-b
6. click redirect to /
7. this does not work

Current vs. Expected behavior

current: when clicking redirect to / in /test-b, redirect does not work.
expected: redirect to /

Provide environment information

Operating System:
  Platform: win32
  Arch: x64
  Version: Windows 11 Home China
  Available memory (MB): 16164
  Available CPU cores: 16
Binaries:
  Node: 20.18.0
  npm: 10.8.3
  Yarn: 1.22.22
  pnpm: 9.12.2
Relevant Packages:
  next: 15.0.3-canary.6 // Latest available version is detected (15.0.3-canary.6).
  eslint-config-next: N/A
  react: 19.0.0-rc-7c8e5e7a-20241101
  react-dom: 19.0.0-rc-7c8e5e7a-20241101
  typescript: 5.3.3
Next.js Config:
  output: N/A

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

Navigation

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

next dev (local), next start (local)

Additional context

No response

[llipengda]

Is this a bug, or was it designed to be this way?
I deployed it on Vercel next-redirect-bug-gamma.vercel.app
Can someone help me?