Search params object empty on production (vercel) but not locally

[pitops]

Link to the code that reproduces this issue

https://github.com/pitops/nextjs-search-params-issue

To Reproduce

you have a category/[slug]/page.tsx with the following

interface CategoryPageProps {
    params: {
        slug: string
    }
    searchParams: {
        slug: string
    }
}
const CategoryPage: React.FC<CategoryPageProps> = async ({
                                                             params,
                                                             searchParams
                                                         }) => {
    console.log('params', params)
    console.log('searchParams', searchParams)

    return <div>test</div>
}

export default CategoryPage

I try the following URL: http://localhost:3000/category/test?slug=1

locally -> searchParams { slug: 1 }
vercel -> searchParams {}

Current vs. Expected behavior

search params object should be filled in production as well

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 21.6.0: Mon Aug 22 20:20:05 PDT 2022; root:xnu-8020.140.49~2/RELEASE_ARM64_T8101
Binaries:
  Node: 19.6.0
  npm: 9.5.0
  Yarn: 1.18.0
  pnpm: N/A
Relevant Packages:
  next: 14.1.0
  eslint-config-next: 13.5.4
  react: 18.2.0
  react-dom: 18.2.0
  typescript: 5.2.2
Next.js Config:
  output: N/A

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

App Router

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

Vercel (Deployed)

Additional context

No response