Weird dark grey block in UI appeared as of v2.6.20

[mjnowen]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

As of exactly v2.6.20 on macOS, this weird dark grey block has appeared in the Cursor UI at the bottom of my “OUTLINE” and “TIMELINE” sections (bottom-left corner) of Cursor UI. This “block” is visible in all menus, such as “Explorer”, “Source Control”, “Extensions”, etc…with the exception of “Search” where its not visible.

See screengrab for example of this weird block in the UI. Anyone else get this?

Steps to Reproduce

Use Cursor v2.6.20 on macOS

Expected Behavior

Don’t display whatever this weird thing is…!

Screenshots / Screen Recordings

Operating System

MacOS

Version Information

Version: 2.6.20
VSCode Version: 1.105.1
Commit: b29eb4ee5f9f6d1cb2afbc09070198d3ea6ad760
Date: 2026-03-17T01:50:02.404Z
Build Type: Stable
Release Track: Default
Electron: 39.8.1
Chromium: 142.0.7444.265
Node.js: 22.22.1
V8: 14.2.231.22-electron.0
OS: Darwin arm64 25.3.0

Does this stop you from using Cursor

No - Cursor works, but with this issue

[msfeldstein (Michael Feldstein)]

What color theme are you in

[mjnowen]

Anysphere+ (Dark)

I tried switching to lots of different color themes and also restarted Cursor and neither fixes the issue.

[shealan (Shealan Forshaw)]

It’s a UI regression bug. A change in Cursor’s recent update is causing the content of the primary sidebar from not filling the full height.

This exposed the default background which is handled by the .monaco-workbench class. By default that is #252526 in dark mode (what you and I are seeing).

There’s no way of setting this colour via a theme setting. I don’t think it can be overridden without attempting to inject an !important via css. However, I can’t seem to get the Apc Customize UI++ extension to do this. We’ll likely just have to wait for Cursor to fix…