IDE Freezes and Repeatedly Throws Error When Copying or Renaming Large .ipynb Files

[kevinyin9]

Describe the Bug

Whenever I copy or rename a file in Cursor IDE, an error repeatedly pops up, causing the entire IDE to become extremely laggy and nearly unusable. The error dialog keeps reappearing continuously without any manual action. I have attempted a full reinstall and disabled all extensions, but the issue persists.
The error message shown is:

BG: File length of "file:///c%3A/Users/USER/Documents/GitHub/2001/a.ipynb#197" is 53043236 which exceeds the maximum supported file size of 52428800

Steps to Reproduce

1. Copy or rename a .ipynb file (specifically one that is around or larger than ~53 MB).
2. The error pops up immediately.
3. The IDE becomes extremely unresponsive.
4. The error window continuously reappears without stopping, even after dismissing it.

Expected Behavior

Copying or renaming a file—even a large one—should not trigger any persistent errors or cause system lag.
If a file exceeds the maximum supported size, the IDE should handle it gracefully with a single, non-blocking warning instead of infinite error loops and performance degradation.

Screenshots / Screen Recordings

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.2.4 (user setup)
VSCode Version: 1.99.3
Commit: a8e95743c5268be73767c46944a71f4465d05c90
Date: 2025-07-10T17:09:01.383Z
Electron: 34.5.1
Chromium: 132.0.6834.210
Node.js: 20.19.0
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.26100

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

[kevinyin9]

anyone here?

[kevinyin9]

any dev here?