Temporary Chat Refresh Causes “Page Not Found” with HTTP 431 Error (Session Not Restored)
OpenAI Developer Community
April 6, 2026
When using a temporary chat session, refreshing the browser results in a “Page Not Found” error instead of restoring the session or loading a new temporary chat interface.
Steps to Reproduce:
Open a temporary chat session
Start chatting
Click the browser refresh button
Observe the result
Expected Behavior
After refreshing, the application should either:
Restore the existing temporary chat session, or
Redirect to a new/default temporary chat screen
Actual Behavior
The page fails to load and displays:
“Page Not Found” or “This page isn’t working”
HTTP ERROR 431
Environment Details:
Device: MacBook Pro (M1)
OS: macOS
Browser: Google Chrome
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