Notebook/UI/Custom models bugs

Support Bug Reports
1

Describe the Bug

I’m going to put all bugs in one place since there’s a set of them. I specifically updated to last nightly version to check if they’re already fixed.

Notebook related bugs.

I managed to capture only two:

  1. No preview for tab autocompletion, as you can see I hit the tab and it adds new lines with code, but no preview is being displayed, not inline nor a drawn window on top. no_preview, no_preview_2
  2. There’s something going wrong with checkpointing in notebooks. I captured failed checkpoint restoration on video, but there are other more rare bugs like sometimes it creates lingering undo buttons. notebook_checkpointing, no_undo

I still rarely meet frozen text selection, but it happens way less often.

Custom models

  1. The bug where openAI override breaks claude models is still there, and it’s extremely annoying to see cursor doing a call to native model to my endpoint. opus_call_to_openAI_base video is about it.
  2. Not really a bug, but I noticed that edit_file tool is gone from 3rd party endpoints and replaced with search_replace, is this a final change, and is it applicable to cursor native models as well or only for custom models? It would be cool if you’d include such changes in changelogs, that’s a pretty big change of how agent operates.

UI

There’s old_new_chat file which shows a bit funny way + button for chat creation operates. Basically, if you start typing something and then close a chat, then + will restore that chat and create a new one. Closing new and then old one will still not delete the old one and it will be recreated, to delete that old chat you have to close it first. This is counterintuitive behaviour in a way that + button opens 2 chats, and to close a chat you have to create a new one?..

Steps to Reproduce

I’m attaching videos on gdrive for all bugs I’ve mentioned.

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.4.0-pre.0.patch.0 (user setup)
VSCode Version: 1.105.1
Commit: 962001534da944af13437db0868688f1f07302d0
Date: 2025-12-24T16:14:25.819Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.26200

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

2

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Also there’s a silly bug with old buttons sticking in new version, as you can see in my WSL I have old “agent pane” button, no + etc, despite both windows being up do date with same settings. Bug goes away by clicking on 3 dots and then clicking on any of predefined layouts (zen/editor etc). Minor thing, but might save you time when others will report this.

3

Thanks for raising these issues, I’ve passed this on to the team. Your feedback helps us catch issues before stable release.

4

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