cookies().set inside Server Action is broken when using middleware - dev mode only

[padupuy]

Link to the code that reproduces this issue

https://github.com/padupuy/nextjs-server-action-cookies-middleware-bug

To Reproduce

In dev mode :

1. Create a middleware.ts and attach a cookie to the NextResponse
2. Create a server action, create a cookie and redirect the user

nextjs-bug-server-action-cookie-middleware.mp4

Current vs. Expected behavior

In dev mode :
I would like to set a cookie A from Server Action and a cookie B from the middleware.ts.
I found that if only set a cookie A from Server Action without doing anything into middleware.ts it works well.
Unfortunately, if I also set a cookie B inside the middleware, only the cookie B from the middleware is sent to the browser.
I expect that both cookie A and B are sent to the browser

In the live example, the bug is not present : https://nextjs-server-action-cookies-middleware-bug.vercel.app/

Provide environment information

Operating System:
  Platform: darwin
  Arch: x64
  Version: Darwin Kernel Version 23.3.0: Wed Dec 20 21:28:58 PST 2023; root:xnu-10002.81.5~7/RELEASE_X86_64
Binaries:
  Node: 20.9.0
  npm: 10.1.0
  Yarn: 1.22.19
  pnpm: N/A
Relevant Packages:
  next: 14.1.3
  eslint-config-next: 14.1.3
  react: 18.2.0
  react-dom: 18.2.0
  typescript: 5.4.2
Next.js Config:
  output: N/A

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

Middleware / Edge (API routes, runtime)

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

next dev (local)

Additional context

No response

[devjiwonchoi]

I'm assuming this is an expected behavior of redirect since it will replace the current request including the added Set-Cookie header.

[padupuy]

This issue is maybe related to #49442

[marcospassos]

Any cookie set on a server action is overridden if a cookie is set on the middleware. Additionally, any cookies set on server actions are not available in the response.cookies