Next `^16.3.0` emit `MaxListenersExceededWarning`

Link to the code that reproduces this issue

https://github.com/RSickenberg/nextjs-httpxy-listener-leak

To Reproduce

Readme on the repo provided.

Current vs. Expected behavior

Before 16.3.x, issues were not dispatched. This is probably a regression.

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 25.6.0: Fri Jul 31 19:18:49 PDT 2026; root:xnu-12377.161.14~5/RELEASE_ARM64_T6000
  Available memory (MB): 32768
  Available CPU cores: 10
Binaries:
  Node: 24.18.0
  npm: 12.0.1
  Yarn: 1.22.17
  pnpm: N/A
Relevant Packages:
  next: 16.3.2
  eslint-config-next: N/A
  react: 19.2.8
  react-dom: 19.2.8
  typescript: 6.0.3
Next.js Config:
  output: standalone

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

Not sure, Server Actions, Runtime

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

Other (Deployed), next dev (local), next start (local)

Additional context

Tested until ^16.3.1-canary.26 or 16.3.2.

Related discussion: https://github.com/vercel/next.js/discussions/96973 & https://x.com/timneutkens/status/2090399274525655458

Start with the README in the linked reproduction repository and run it against Next 16.3.2, then compare the behavior with the earlier versions listed in the issue. Done means confirming the MaxListenersExceededWarning and narrowing the regression to the affected runtime or Server Actions path.