Ecommerce Template: 404 Causes Infinite Loop

Describe the Bug

Issue

In production, when a page slug isn't found, it results in an infinite 404 loop, with the not-found.tsx page reloading over and over.

Thoughts

This used to be a Next issue in development mode but I can't find much info about it happening in production.

One thing I noticed is that if you wrap the page content (children) within (app)/layout in a suspense boundary the layout becomes server rendered and the not-found page streams in and doesn't loop. However this introduces a completely different issue in that it makes all Link components on the page stop working, which effectively breaks the page, even though it makes sense to have a suspense boundary here.

Some issues that are related to the latter issue but may help to debug:
Vercel: 404 page isn't server rendered when using notFound()
Vercel: not-found.tsx not working

Link to the code that reproduces this issue

https://github.com/payloadcms/payload/tree/main/templates/ecommerce

Reproduction Steps

1. Set up the template using the CLI: pnpx create-payload-app not-found-loop -t ecommerce
2. Start the server in production: pnpm dev:prod
3. Visit localhost:3000/foo

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

area: templates

Environment Info

Binaries:
  Node: 24.9.0
  npm: 11.6.0
  Yarn: 1.22.22
  pnpm: 10.17.1
Relevant Packages:
  payload: 3.64.0
  next: 15.5.6
  @payloadcms/db-mongodb: 3.64.0
  @payloadcms/email-nodemailer: 3.64.0
  @payloadcms/graphql: 3.64.0
  @payloadcms/live-preview: 3.64.0
  @payloadcms/live-preview-react: 3.64.0
  @payloadcms/next/utilities: 3.64.0
  @payloadcms/plugin-form-builder: 3.64.0
  @payloadcms/plugin-seo: 3.64.0
  @payloadcms/richtext-lexical: 3.64.0
  @payloadcms/translations: 3.64.0
  @payloadcms/ui/shared: 3.64.0
  react: 19.2.0
  react-dom: 19.2.0
Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 23.5.0: Wed May  1 20:12:58 PDT 2024; root:xnu-10063.121.3~5/RELEASE_ARM64_T6000
  Available memory (MB): 16384
  Available CPU cores: 8