Screen flickers when setting cookies (server side)

[HenrikZabel]

Link to the code that reproduces this issue

https://github.com/HenrikZabel/nextjs-flicker

To Reproduce

1. Start the application in development (npm run dev)
2. Click on the button "Update cookies"
3. The text/page will flicker

Current vs. Expected behavior

How described above the screen flickers when the cookies update.

The screen should normally not flicker when updating the cookies.

Provide environment information

Operating System:
  Platform: win32
  Arch: x64
  Version: Windows 10 Home
Binaries:
  Node: 21.5.0
  npm: N/A
  Yarn: N/A
  pnpm: N/A
Relevant Packages:
  next: 14.1.0
  eslint-config-next: 14.1.0
  react: 18.3.1
  react-dom: 18.3.1
  typescript: 5.4.5
Next.js Config:
  output: N/A

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

Not sure

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

next dev (local)

Additional context

No response