opengraph image does not work when inside a route group

[stefanprobst]

Link to the code that reproduces this issue

https://github.com/stefanprobst/issue-next-og-route-group

To Reproduce

1. clone repo, pnpm install && pnpm run build && pnpm run start
2. go to http://localhost:3000/en/opengraph-image
3. see 404 page

to see that it is working correctly when the route group is removed, you can check out the "no-route-group" branch, go to http://localhost:3000/en/opengraph-image and see the og image displayed correctly.

Current vs. Expected behavior

current: opengraph image not displayed when inside a route group
expected: opengraph image should be displayed

Provide environment information

Operating System:
  Platform: linux
  Arch: x64
  Version: #202403151937 SMP PREEMPT_DYNAMIC Fri Mar 15 19:52:22 UTC 2024
  Available memory (MB): 31401
  Available CPU cores: 16
Binaries:
  Node: 22.11.0
  npm: 10.9.0
  Yarn: 1.22.22
  pnpm: 9.14.2
Relevant Packages:
  next: 15.1.1-canary.1 // Latest available version is detected (15.1.1-canary.1).
  eslint-config-next: N/A
  react: 19.0.0
  react-dom: 19.0.0
  typescript: 5.7.2
Next.js Config:
  output: N/A

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

Metadata

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

next build (local)

Additional context

No response