Cursor chats fail to load or accept input after idle

Support Bug Reports
1

Describe the Bug

After leaving a chat idle (e.g. laptop sleep or background), certain past chats in the Cursor IDE will never reopen properly—or, if they do, they refuse to accept new prompts.

Actual Behavior & Console Logs:
Load failure:

[composer] Timeout waiting for composer to load and show
[composer] No composer data handle found

Prompt hang:

[composer] Failed to get complete AI response
Error fetching token usage (attempt X/5): No composer data handle found

Command registration conflict:

ERR Cannot register two commands with the same id: workbench.panel.aichat.view.*.toggleVisibility

Missing past-chat images:

GET …Screenshot 2025-07-29 at 4.38.56 PM… net::ERR_FILE_NOT_FOUND
Error: Image selected in conversation was not found on disk

Frequency & Scope:
Only affects certain older or backgrounded chats.

Extension bisector confirms no third-party extension is responsible.

Steps to Reproduce

Open a chat and leave it idle (e.g. put laptop to sleep or switch focus).

Press ⌘+L to open the chat picker.

Select an older/stalled chat.

Observe “Loading chat…” stall, then fall back to the new-chat screen.

Expected Behavior

Past chats should reopen reliably.

Submitting a new prompt returns a response instead of hanging.

Screenshots / Screen Recordings

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Cursor IDE v1.2.4 (Universal)

VS Code v1.99.3 (Commit a8e9574, 2025-07-10)

Electron 34.5.1 · Chromium 132.0.6834.210 · Node.js 20.19.0 · V8 13.2.152.41-electron.0

Additional Information

macOS 14.5.0 (Darwin arm64 24.5.0)

I was unable to upload a .log file or paste it here in plaintext. I can provide it upon request, but will need to have a method to provide.

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

2

New.log here.

Session Details (from new.log):

  • Opened the chat panel and attempted to load a known-stalling chat.

  • Attached that chat as “past chat” context and sent “Lorem Ipsum” (this succeeded).

  • Interrupted the response mid-generation (“Failed to get complete AI response” error can be ignored at this point in the log).

  • Closed and reopened the panel.

Opened a chat that loads but then hangs on any prompt—“Generating…” never completes.

3

If anybody has experience with this type of issue and has found a way to mitigate it, that would be awesome. I’ve even tried to look around my machine’s directory to find a json, txt, or md version of the chat histories to provide as context in a new chat—but to no avail.

4

Duplicated versions of the openable chat also have the same issues. This leads me to believe this is an issue with the chat content itself.

5

Perhaps it has to do with attaching a screenshot that I dragged immediately from macOS’s screenshot thumbnail? That means it wouldn’t be saved to disk, and rather kept in RAM or some sort of cache file.

6

Update: The openable conversation is working for some reason now.

7

^^^This was not a solution. The unopenable conversations still exist.

8

I had an issue with writing to any opened/new chats on Linux unless I would open Command Palette and run Developer: Restart Extension Host

9

Attempted thrice, opening still fails! Thanks for the input, though.

10

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