Bug Title: Visual Editor CSS changes not persisting - Apply/Undo buttons don’t track edits

[Mugalu_Smith]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

When making CSS style changes in the browser preview/visual editor mode, the edits are not being properly tracked or persisted. After making ~50 edits, changes stop being applied to source files.

Steps to Reproduce

Steps to Reproduce:

1. Open a project with Vue/CSS files
2. Use visual editor mode to make CSS changes in browser preview
3. Make multiple sequential edits (10+)
4. Observe that later edits don’t persist to source files
5. Apply/Undo buttons don’t accurately reflect the edit state

Expected Behavior

• All CSS edits should persist to source files
• Apply/Undo buttons should track all changes accurately

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Environment:

• Cursor Version: [your version]
• OS: [macOS/Windows/Linux version]
• Project type: Nuxt/Vue with scoped CSS

For AI issues: which model did you use?

Opus 4.5

For AI issues: add Request ID with privacy disabled

Nope

Additional Information

Nope

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

[deanrie]

Hey, thanks for the report.

Visual editor is a fairly new feature, and this CSS persistence issue sounds like a bug. To help the dev team, we need more details:

1. Exact Cursor version: Help → About Cursor → Copy
2. Request IDs: After attempting to apply changes that didn’t persist, copy Request ID from chat context menu (top right → Copy Request ID)
3. Console errors: Open Developer Tools (Cmd+Shift+P → Developer: Toggle Developer Tools) and check if errors appear when attempting to apply changes
4. Screenshots: Show the state of Apply/Undo buttons when the issue occurs

Also clarify - does the problem start exactly after ~50 edits, or is that an approximate number? And do all types of CSS changes fail to persist, or only specific properties?

Let me know if this helped. If not, I’ll pass it to the team.