Mermaid Diagram Code Block Content Misalignment in Chat

[ysl47698]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Bug Report: Mermaid Diagram Code Block Content Misalignment in Chat

Where does the bug appear (feature/product)? Cursor IDE Describe the Bug Environment Cursor Version: 1.7.28 (please update with your actual version) OS: Linux 6.1.0-39-amd64 Date: October 3, 2025 Summary When AI responses contain multiple Mermaid diagrams followed by code blocks, the code blocks display shifted/wrong content in Cursor’s chat markdown renderer. However, when the same chat is exported to a .md file, all content renders correctly in external markdown viewers. Description In Cur…

Chat renders wrong content in markdown code blocks - substitutes sections

Where does the bug appear (feature/product)? Cursor IDE Describe the Bug Cursor Chat has a critical markdown rendering bug where code blocks display content from a completely different section of the document. Specifically: a regular text code block (ASCII directory tree) is being replaced with Mermaid diagram code from another section. Steps to Reproduce Create a markdown file with multiple sections Include a Mermaid diagram in Section 1.4: ### 1.4. Diagram \`\`\`mermaid graph TD subgr…

I’ve seen more than one post describing this problem, and I’m also suffering from this bug, so I hope it can be fixed!

Steps to Reproduce

Bug Report: Mermaid Diagram Code Block Content Misalignment in Chat

Where does the bug appear (feature/product)? Cursor IDE Describe the Bug Environment Cursor Version: 1.7.28 (please update with your actual version) OS: Linux 6.1.0-39-amd64 Date: October 3, 2025 Summary When AI responses contain multiple Mermaid diagrams followed by code blocks, the code blocks display shifted/wrong content in Cursor’s chat markdown renderer. However, when the same chat is exported to a .md file, all content renders correctly in external markdown viewers. Description In Cur…

Chat renders wrong content in markdown code blocks - substitutes sections

Where does the bug appear (feature/product)? Cursor IDE Describe the Bug Cursor Chat has a critical markdown rendering bug where code blocks display content from a completely different section of the document. Specifically: a regular text code block (ASCII directory tree) is being replaced with Mermaid diagram code from another section. Steps to Reproduce Create a markdown file with multiple sections Include a Mermaid diagram in Section 1.4: ### 1.4. Diagram \`\`\`mermaid graph TD subgr…

I’ve seen more than one post describing this problem, and I’m also suffering from this bug, so I hope it can be fixed!

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Bug Report: Mermaid Diagram Code Block Content Misalignment in Chat

Where does the bug appear (feature/product)? Cursor IDE Describe the Bug Environment Cursor Version: 1.7.28 (please update with your actual version) OS: Linux 6.1.0-39-amd64 Date: October 3, 2025 Summary When AI responses contain multiple Mermaid diagrams followed by code blocks, the code blocks display shifted/wrong content in Cursor’s chat markdown renderer. However, when the same chat is exported to a .md file, all content renders correctly in external markdown viewers. Description In Cur…

Chat renders wrong content in markdown code blocks - substitutes sections

Where does the bug appear (feature/product)? Cursor IDE Describe the Bug Cursor Chat has a critical markdown rendering bug where code blocks display content from a completely different section of the document. Specifically: a regular text code block (ASCII directory tree) is being replaced with Mermaid diagram code from another section. Steps to Reproduce Create a markdown file with multiple sections Include a Mermaid diagram in Section 1.4: ### 1.4. Diagram \`\`\`mermaid graph TD subgr…

I’ve seen more than one post describing this problem, and I’m also suffering from this bug, so I hope it can be fixed!

For AI issues: which model did you use?

all model

Does this stop you from using Cursor

Yes - Cursor is unusable

[deanrie]

Hey, thanks for the report.

This is a known issue. The team is aware and working on a fix.

[user437]

Hi, thanks for the team’s efforts, hope the bug could be fixed soon. This feature is critical for my daily usage.