[BUG] Title: force-dynamic SSR pages require revalidate = 0 to prevent blank pages

[valleywood]

Describe the bug

• SSR pages with dynamic = 'force-dynamic' show blank on hard refresh when ppr = true in next config
• Adding revalidate = 0 fixes the issue
• This shouldn't be necessary for force-dynamic pages
• Reproduction repo:
  https://github.com/valleywood/open-next-ssr-ppr-issue

Steps to reproduce

Steps to reproduce is described in the README of this attached repo where all code to reproduce the error also can be found:
https://github.com/valleywood/open-next-ssr-ppr-issue

Expected behavior

force-dynamic pages should work without revalidate
Actual: require revalidate = 0 to prevent blank pages

@opennextjs/cloudflare version

1.9.2

Wrangler version

4.42.0

next info output

Operating System:
  Platform: darwin
  Arch: x64
  Version: Darwin Kernel Version 24.3.0: Thu Jan  2 20:24:16 PST 2025; root:xnu-11215.81.4~3/RELEASE_ARM64_T6000
  Available memory (MB): 32768
  Available CPU cores: 10
Binaries:
  Node: 22.14.0
  npm: 10.9.2
  Yarn: 4.9.1
  pnpm: N/A
Relevant Packages:
  next: 15.5.1-canary.23
  eslint-config-next: N/A
  react: 19.1.0
  react-dom: 19.1.0
  typescript: 5.9.2
Next.js Config:
  output: N/A

Additional context

100% reproducable in repo. Was expecting not to have to add export const revalidate = 0; to my SSR page to avoid this bug.

[sommeeeer]

Thanks for the issue and report!

The repo is either private or 404.

[valleywood]

Thanks for the issue and report!

The repo is either private or 404.

Sorry for that 😅 Now it should be public.