Losing hours of progress due to issues with version history and checkpoint failure

Describe the Bug

Ever since upgrading to 1.2 (now 1.2.4) I’m losing hours of work and I come back to Cursor still open, chat still open, but I’m at a revision I clearly recognize from yesterday, missing a ton of updates.

Checkpoints seemingly do nothing. In one case, my prompts completely disappeared from the chat history and I had to force quit and restart for them to appear again.

Steps to Reproduce

Just use cursor 1.2.

Expected Behavior

I expect to leave my computer for 45 minutes and comeback to the same revision and chat without losing an arbitrary amount of progress.

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.2.4 (Universal)
VSCode Version: 1.99.3
Commit: a8e95743c5268be73767c46944a71f4465d05c90
Date: 2025-07-10T16:55:16.443Z
Electron: 34.5.1
Chromium: 132.0.6834.210
Node.js: 20.19.0
V8: 13.2.152.41-electron.0
OS: Darwin arm64 23.6.0

Does this stop you from using Cursor

Yes - Cursor is unusable

In fact, this may have begun after I upgraded to Ultra, now that I think about it.