Plan Mode Always Error (Crash)

Support Bug Reports
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1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Just doing plan mode, already retry multiple time all error (crash)

Steps to Reproduce

Just normal plan mode

Expected Behavior

it should working perfect

Screenshots / Screen Recordings

Xnip2026-01-27_16-54-31.png
Xnip2026-01-27_16-54-31.png3444Ă—1430 236 KB

Operating System

MacOS

Version Information

Version: 2.4.21
VSCode Version: 1.105.1
Commit: dc8361355d709f306d5159635a677a571b277bc0
Date: 2026-01-22T16:57:59.675Z
Build Type: Stable
Release Track: Default
Electron: 39.2.7
Chromium: 142.0.7444.235
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Darwin arm64 25.2.0

For AI issues: which model did you use?

All model error

Does this stop you from using Cursor

Yes - Cursor is unusable

3

Hey, this is a known issue. It’s a bug in Plan mode in version 2.4.21 that can cause the window to freeze and crash.

Good news: the team has already fixed it. The fix should ship in the next update. Similar reports: Window crashed when model generate plan with plan mode

Workaround until the fix lands:

  • Use Ask or Agent mode instead of Plan mode. The issue doesn’t trigger there.
1 Like
4

Confirming Critical Bug: 96M Tokens drained in 28h due to Cache Read Loop

I am experiencing this exact issue on the latest version. My usage logs confirm a massive recursive loop with claude-4.5-sonnet-thinking.

Here is the data from my CSV export:

  • Timeframe: Jan 30 - Jan 31 (~28 hours)

  • Total Drained: 96.2 Million Tokens

  • The “Smoking Gun”: Out of these 96M tokens, 82.9 Million were just “Cache Reads”, while the actual Output was only ~800k tokens.

The Agent/Thinking model clearly got stuck in a “Reviewing” state, repeatedly re-reading the entire context without exiting. This burned through my entire quota/credits overnight.

I have already emailed support with the logs, but posting here to confirm that v2.4.x has a critical loop bug.