Infinite loop failed to forward action response error

Link to the code that reproduces this issue

https://github.com/recokz/app

To Reproduce

I didn't find a stable and precise way to reproduce the error.
But the error always occurs when the user interacts with the application.
The error occurs both in dev mode and in production.

Current vs. Expected behavior

I noticed a lot of errors with the POST request that returns a 404 error, then the error failed to forward action response appears, which does not stop until I restart the application.
I will attach screenshots of the logs below:

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 24.3.0: Thu Jan  2 20:24:23 PST 2025; root:xnu-11215.81.4~3/RELEASE_ARM64_T6020
  Available memory (MB): 16384
  Available CPU cores: 10
Binaries:
  Node: 20.10.0
  npm: 10.2.3
  Yarn: 1.22.21
  pnpm: 9.4.0
Relevant Packages:
  next: 15.2.3 // There is a newer version (15.2.4) available, upgrade recommended! 
  eslint-config-next: 15.1.7
  react: 19.0.0
  react-dom: 19.0.0
  typescript: 5.7.3
Next.js Config:
  output: standalone
 ⚠ There is a newer version (15.2.4) available, upgrade recommended! 
   Please try the latest canary version (`npm install next@canary`) to confirm the issue still exists before creating a new issue.
   Read more - https://nextjs.org/docs/messages/opening-an-issue

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

Middleware, Server Actions

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

next start (local), next dev (local)

Additional context

No response

Start with the linked recokz/app reproduction and the reported POST 404 path, then trace error forwarding across Middleware and Server Actions in next dev and next start. Done means obtaining a stable reproduction and showing that the action response error terminates instead of looping indefinitely.