redirect in server action and revalidateTag cause a parallel route to lose its active state

[roksui]

Link to the code that reproduces this issue

https://github.com/roksui/my-nextagram

To Reproduce

1. Clone the repository and checkout to the master branch.
2. Start the applicatin in dev mode using npm run dev.
3. Go to "/login" page and press the Login button.
4. Click on photo 1 and inside the modal click on the add comment button.
5. The parallel route behind the modal loses its active state and turns blank.

Current vs. Expected behavior

I expected the parallel route segment behind the modal to not lose its active state when the router cache is cleared when calling revalidateTag in a server action which should only update the data inside the modal. However, I observed that while the data is successfully revalidated in the modal, the parallel route behind the modal loses its active state.

Provide environment information

Operating System:
  Platform: win32
  Arch: x64
  Version: Windows 10 Pro
  Available memory (MB): 32545
  Available CPU cores: 16
Binaries:
  Node: 18.17.1
  npm: N/A
  Yarn: N/A
  pnpm: N/A
Relevant Packages:
  next: 14.3.0-canary.9 // Latest available version is detected (14.3.0-canary.9).
  eslint-config-next: 14.1.1-canary.52
  react: 18.2.0
  react-dom: 18.2.0
  typescript: 5.3.3
Next.js Config:
  output: N/A

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

Parallel & Intercepting Routes

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

next dev (local), next start (local)

Additional context

• This bug was introduced in 14.3.0-canary.5 (supposedly with the PR fix refresh behavior for discarded actions #64532).
• When looking at the Chrome dev tool's network tab when clicking on the button for adding a comment, after revalidateTag("comments") is called, the browser receives a RSC payload for the "/login" route. Now, when I remove redirect("/") inside the server action for the login, this RSC payload is not received after clicking on the add comment button.
• If I use a version before 14.3.0-canary.5, the background segment doesn't lose its active state, however occasionally, the comment list is not revalidated and updated in the modal straight away.

[roksui]

Just found out that if I manually refresh the browser after being redirected to "/" when pressing the Login button, the RSC paylod for the "/login" page is not fetched upon clicking on the add comment button, and everything seems to be working fine from then on.

[ztanner]

Nice catch @roksui, thanks for the clear repro. This should be fixed in #64730

[github-actions]

This closed issue has been automatically locked because it had no new activity for 2 weeks. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.