Hi,
Same issue!!
I downgraded to 3.9 and it is working now.
Well, it still hasn’t shipped in 3.11.13 which I just updated to after previously downgrading to 3.9. I upgraded because you said it should’ve been in ~3.10.20…
It’s still not fixed. Is this deliberate?
Hi, same issue with
Version: 3.11.13
VS Code Extension API: 1.125.0
Commit: 3f21b08f0b436a07be29fbfe00b304fa15553350
Date: 2026-07-10T01:45:28.254Z
Layout: IDE
Build Type: Stable
Release Track: Nightly
Electron: 40.10.3
Chromium: 144.0.7559.236
Node.js: 24.15.0
V8: 14.4.258.32-electron.0
xterm.js: 6.1.0-beta.256
OS: Darwin arm64 25.3.0
Hey there.
We can’t reproduce this and a few users have reported that it’s fixed in newer versions. Providing more details would be helpful!
Here is my experience on 3.11.13.
- Codex no longer shows in the list of my extensions as it used to in the left side bar (like when clicking the chevron in the top icon nav section). I had it pinned so it should always be visible.
- Doing Ctrl+Shift+P and Codex:New Codex Agent first opens a new tab then briefly shows the codex logo while it load and then just a blank tab with the title “new”.
- In the tab section in the center, if i click the three dots on one of the tabs and click Open Codex Sidebar, Codex now shows in the Cursor Agent sidebar in the right hand side vs being in the left side bar with the extensions. This forces me to constantly toggle open and close the codex and cursor agent windows if i want to use them in parallel.
I experienced a similar issue in Cursor.
The Codex icon disappeared from the Primary Side Bar, even though it had previously been pinned there.
I also had Cmd+Shift+C assigned to Focus on Codex View, but the shortcut stopped working.
When I manually ran Open Codex Sidebar, Codex opened inside the Agent sidebar on the right instead of returning to its own view in the Primary Side Bar on the left.
I then tried dragging the Codex view back to the left. The behavior was very inconsistent: on most attempts, Cursor placed Codex as a nested section inside another view such as Explorer, instead of restoring it as a standalone sidebar view. After around 15 attempts, it finally returned to the correct location.
However, the original shortcut was still broken. The keyboard shortcut debug logs indicated that Focus on Codex View failed because the Codex view had not been initialized or opened yet, so there was nothing to focus.
My workaround was to reassign Cmd+Shift+C from Focus on Codex View to Open Codex Sidebar. The shortcut now works again.
So there seem to be two related issues:
- Codex randomly disappears or loses its location in the Primary Side Bar.
- Focus on Codex View cannot reopen or initialize the view once it is missing.
Thanks for you fantastic work btw
After upgrade to Cursor 3.15.6 Codex extension disappeared from UI, Cmd+Shift+P → Codex: Open Codex Sidebar does not work as well. Cmd+Shift+P → Codex: New Codex Agent works, but it opens non-multiplexed version of Codex extension UI, much less convenient compared to multiplexed sidebar.
All worked well on 3.14.x before the upgrade. I use Linux / XFCE.
Hi. Same here on Macbook , I upgraded to 3.15.6 and Codex tab now under Explorer and I cannot drag it in to the Agents pane on the right side. Any suggestions?
Before upgarde. My layout was: Left side - Explorer, middle side - my code and right side - Codex. Now on 3.15.6 codex is disappeared from the right side and moved under explorer. How to return my layout?
I encountered the same problem, with the same version.
I have the same problem, from the latest update: Version: 3.15.6 (system setup)
VS Code Extension API: 1.128.0
Commit: a1f686545fd0ce8917bbd2449f733551a9bce420
Date: 2026-08-06T01:41:03.876Z
Layout: IDE
Build Type: Stable
Release Track: Default
Electron: 40.10.3
Chromium: 144.0.7559.236
Node.js: 24.15.0
V8: 14.4.258.32-electron.0
xterm.js: 6.1.0-beta.291
OS: Windows_NT x64 10.0.26200
It worked yesterday.
EDIT: Confirmed, downgrading to 3.14.27 made it work again.
Same problem here, version 3.15.6. Codex disapeared, again. Would be nice to be careful about this .. especially when it already happened once.
Solution: roll back to version 3.14.27
Is there any risk to lose parameters or anything when downgrading ? What’s the easiest way to do it ?
That’s just annoying tbh and it should not even happens twice.
Annoying, It’s downright annoying! I even wrote about it in this thread: Aren't you tired of breaking the UI and UX in a working tool? - #2 by system
I noticed a problem after updating and downgraded by downloading the 3.14 image from here Cursor · Download and simply installing it over it. MacOS. Nothing was lost, and the Codex was back where it was.
who is the person respsonsible for making unneccesary changes to the codex UI and removing the normal Codex extension from the top of the IDE to the bottom where you can no longer access your chats? Have a long talk with them, this is completely absurd. You did this a couple months ago and i had to downgrade for weeks because of this incomptenece.
For a paid product to do something like this intentionally, that’s just unacceptable. I understand that Cursor’s own models and the chat view are the selling point, but crippling the UI and UX by removing the second sidebar is not the way to do it. Please restore the second sidebar, I can’t work in Cursor anymore because of this change.
macOS — Cursor 3.15.6
I have the same issue after updating to Cursor 3.15.6.
Before the update, I could position the OpenAI Codex extension as a tab alongside my Cursor agent/chat tabs. After updating to 3.15.6, Codex is stuck in a separate editor area and I can no longer move it back.
I have tried:
- Dragging the Codex tab into the other editor group
View: Move Editor into Right Group- Moving/rearranging the editor groups
None of these work.
Expected behavior: Codex should be movable into the same tab group where my Cursor tabs are located, as it was before the 3.15.6 update.
Actual behavior: Codex remains in its own area and cannot be moved into that tab group.
OS: macOS
Cursor version: 3.15.6
This worked correctly for me before upgrading to 3.15.6.
Edit: Solution here (Cursor 3.15.6: Codex can no longer be moved into the Agent tab group - #11 by ianmoone163)
I’m on latest version (3.15.6) in win11. The extension is nowhere to be found not in left nor right panel. I’m downgrading now to previous version and disable auto update.
Runtime error show:
