.md viewer with cloud files

[masonearl]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Issue 1: Cloud-synced .md files fail to open in formatted view
When opening markdown files stored in cloud-synced folders (iCloud, Dropbox, etc.), Cursor frequently throws an error and fails to render the formatted preview. The workaround is opening the file in a basic text editor to view raw markdown, which defeats the purpose.
Issue 2: Paste misdirection when raw file is open
When one of these unformatted .md files is open in the editor (from the workaround above), attempting to paste a screenshot into the chat instead pastes the file path into the open .md document. The paste target seems to get confused between the active file and the chat input.
Possible causes:
Cloud sync latency causing file read issues
Focus/context confusion between editor pane and chat pane
Clipboard handling conflict when certain file types are active

Steps to Reproduce

Open a large project from the cloud, open .md file

Expected Behavior

.md file opens with selected markdown viewer…

Screenshots / Screen Recordings

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.2.20
VSCode Version: 1.105.1
Commit: b3573281c4775bfc6bba466bf6563d3d498d1070
Date: 2025-12-12T06:29:26.017Z (3 days ago)
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 25.2.0

For AI issues: which model did you use?

Composer 1 in this example, but the bug persists no matter the model.

Additional Information

This is how the image appears when trying to paste into the chat, it gets pasted in the .md file that is open with the built in text editor. # Quick Start Guide - TP33.02 Site Utilities Takeoffs

Project: Texas Instruments LFAB2 - Site Utilities
Due Date: December 26, 2025
Status: Ready to Start Takeoffs

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Does this stop you from using Cursor

No - Cursor works, but with this issue

[deanrie]

Hey, thanks for the report. The “Assertion Failed: Argument is undefined or null” error when opening QUICK_START_Takeoffs.md from cloud storage is a known issue with handling synced files.

For now, try:

• Copy the project to a local folder (outside iCloud/Dropbox) - cloud sync conflicts with file access.
• If you must work in the cloud, use GitHub Codespaces or VS Code with Remote SSH instead of local sync.
• Fully restart Cursor (Cmd+Q, then reopen).

Please watch for updates - the team is investigating the bug with cloud path handling.