Error: The Edge Function "middleware" size is 1.02 MB and your plan size limit is 1 MB.

[Olgoetz]

Link to the code that reproduces this issue

https://github.com/Olgoetz/CraftTech

To Reproduce

Deploy the project on Vercel.

Current vs. Expected behavior

Building this project on Vercel results in

Error: The Edge Function "middleware" size is 1.02 MB and your plan size limit is 1 MB. Learn More: https://vercel.link/edge-function-size

altough this function is far below 1 MB according to the build logs (see screenshot)

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 23.6.0: Mon Jul 29 21:16:46 PDT 2024; root:xnu-10063.141.2~1/RELEASE_ARM64_T8112
  Available memory (MB): 8192
  Available CPU cores: 8
Binaries:
  Node: 20.18.1
  npm: 10.8.2
  Yarn: 1.22.22
  pnpm: N/A
Relevant Packages:
  next: 15.1.4 // Latest available version is detected (15.1.4).
  eslint-config-next: 15.1.4
  react: 19.0.0
  react-dom: 19.0.0
  typescript: 5.7.3
Next.js Config:
  output: N/A

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

Developer Experience, Middleware

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

Vercel (Deployed)

Additional context

No response