Routing from a param page to a child page while changing the current param case (same string different case) crashes

[axpro]

Link to the code that reproduces this issue

https://codesandbox.io/p/devbox/vigilant-river-y8rs8r?file=%2Fapp%2F%5BparamA%5D%2Fpage.js%3A9%2C48&layout=%257B%2522sidebarPanel%2522%253A%2522EXPLORER%2522%252C%2522rootPanelGroup%2522%253A%257B%2522direction%2522%253A%2522horizontal%2522%252C%2522contentType%2522%253A%2522UNKNOWN%2522%252C%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522id%2522%253A%2522ROOT_LAYOUT%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522UNKNOWN%2522%252C%2522direction%2522%253A%2522vertical%2522%252C%2522id%2522%253A%2522clsagjayy0006396hrym868ke%2522%252C%2522sizes%2522%253A%255B70%252C30%255D%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522EDITOR%2522%252C%2522direction%2522%253A%2522horizontal%2522%252C%2522id%2522%253A%2522EDITOR%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL%2522%252C%2522contentType%2522%253A%2522EDITOR%2522%252C%2522id%2522%253A%2522clsagjayy0002396h9vms2eu0%2522%257D%255D%257D%252C%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522SHELLS%2522%252C%2522direction%2522%253A%2522horizontal%2522%252C%2522id%2522%253A%2522SHELLS%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL%2522%252C%2522contentType%2522%253A%2522SHELLS%2522%252C%2522id%2522%253A%2522clsagjayy0004396ho5vh4r7s%2522%257D%255D%252C%2522sizes%2522%253A%255B100%255D%257D%255D%257D%252C%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522DEVTOOLS%2522%252C%2522direction%2522%253A%2522vertical%2522%252C%2522id%2522%253A%2522DEVTOOLS%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL%2522%252C%2522contentType%2522%253A%2522DEVTOOLS%2522%252C%2522id%2522%253A%2522clsagjayy0005396htb4wv336%2522%257D%255D%252C%2522sizes%2522%253A%255B100%255D%257D%255D%252C%2522sizes%2522%253A%255B57.24198755283389%252C42.75801244716611%255D%257D%252C%2522tabbedPanels%2522%253A%257B%2522clsagjayy0002396h9vms2eu0%2522%253A%257B%2522tabs%2522%253A%255B%257B%2522id%2522%253A%2522clsagjayx0001396h2am7fv6i%2522%252C%2522mode%2522%253A%2522permanent%2522%252C%2522type%2522%253A%2522FILE%2522%252C%2522filepath%2522%253A%2522%252FREADME.md%2522%252C%2522state%2522%253A%2522IDLE%2522%257D%252C%257B%2522id%2522%253A%2522clsah2dng0002396glgt8qoq2%2522%252C%2522mode%2522%253A%2522permanent%2522%252C%2522type%2522%253A%2522FILE%2522%252C%2522initialSelections%2522%253A%255B%257B%2522startLineNumber%2522%253A9%252C%2522startColumn%2522%253A48%252C%2522endLineNumber%2522%253A9%252C%2522endColumn%2522%253A48%257D%255D%252C%2522filepath%2522%253A%2522%252Fapp%252F%255BparamA%255D%252Fpage.js%2522%252C%2522state%2522%253A%2522IDLE%2522%257D%255D%252C%2522id%2522%253A%2522clsagjayy0002396h9vms2eu0%2522%252C%2522activeTabId%2522%253A%2522clsah2dng0002396glgt8qoq2%2522%257D%252C%2522clsagjayy0005396htb4wv336%2522%253A%257B%2522id%2522%253A%2522clsagjayy0005396htb4wv336%2522%252C%2522activeTabId%2522%253A%2522clsagmhj100lt396hi4r1ehlw%2522%252C%2522tabs%2522%253A%255B%257B%2522type%2522%253A%2522TASK_PORT%2522%252C%2522taskId%2522%253A%2522dev%2522%252C%2522port%2522%253A3000%252C%2522id%2522%253A%2522clsagmhj100lt396hi4r1ehlw%2522%252C%2522mode%2522%253A%2522permanent%2522%252C%2522path%2522%253A%2522%2522%257D%255D%257D%252C%2522clsagjayy0004396ho5vh4r7s%2522%253A%257B%2522id%2522%253A%2522clsagjayy0004396ho5vh4r7s%2522%252C%2522activeTabId%2522%253A%2522clsagmb6k00jm396hkprjfloi%2522%252C%2522tabs%2522%253A%255B%257B%2522type%2522%253A%2522TASK_LOG%2522%252C%2522taskId%2522%253A%2522dev%2522%252C%2522id%2522%253A%2522clsagmb6k00jm396hkprjfloi%2522%252C%2522mode%2522%253A%2522permanent%2522%257D%255D%257D%257D%252C%2522showDevtools%2522%253Atrue%252C%2522showShells%2522%253Atrue%252C%2522showSidebar%2522%253Atrue%252C%2522sidebarPanelSize%2522%253A15%257D

To Reproduce

1. start the app
2. open dev tools
3. click on "/ParamA" link
4. click on "/paramA/paramB" link
5. see dev tools network requests and wait for error to appear

Current vs. Expected behavior

The app should route to the new param page

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 23.3.0: Wed Dec 20 21:30:44 PST 2023; root:xnu-10002.81.5~7/RELEASE_ARM64_T6000
Binaries:
  Node: 20.8.1
  npm: 10.1.0
  Yarn: N/A
  pnpm: N/A
Relevant Packages:
  next: 14.1.1-canary.36 // Latest available version is detected (14.1.1-canary.36).
  eslint-config-next: N/A
  react: 18.2.0
  react-dom: 18.2.0
  typescript: N/A
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)

next dev (local)

Additional context

No response

_NEXT-2377

[ztanner]

Great reproduction -- thank you for reporting. I will have a PR to fix shortly.

[sndalama-data443]

@ztanner Noticed affected areas only list the App Router. However, i am experiencing this bug with the Pages Router aswell.

[github-actions]

This closed issue has been automatically locked because it had no new activity for 2 weeks. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.