Desktop: Katex Parse Error Bug while using GLM-5 #14748

Description

I see this:

ParseError: KaTeX parse error: Expected 'EOF', got '&' at position 336: ...ng>Current H2: "Christmas ...

I think it should print properly because the above is unreadable. I copied the whole thing to Grok & pasted in its own markdown code-block (using ``` triple back-ticks) without sending the chat & it formatted properly:

This happened multiple times.

Plugins

No response

OpenCode version

Version 1.2.10 (1.2.10)

Steps to reproduce

1. Use GLM 5
2. Ask it to generate 25 variations in a table format (I used a .md file in .opencode/agents as a custom agent to generate variations)
3. See it be incorrect with formatting
4. Repeat a few times to see the error

Screenshot and/or share link

No response

Operating System

macOS 26.3

Terminal

Ghostty