`$(a+b)$` is not rendered in Chat

[tamuratak]

Version: 1.107.0-insider (Universal)
Commit: b2426c5
Date: 2025-11-21T13:31:45.793Z
Electron: 39.2.0
ElectronBuildId: 12791201
Chromium: 142.0.7444.162
Node.js: 22.21.1
V8: 14.2.231.18-electron.0
OS: Darwin arm64 24.6.0

Name: GitHub Copilot Chat
Id: GitHub.copilot-chat
Description: AI chat features powered by Copilot
Version: 0.34.2025112102
Publisher: GitHub
VS Marketplace Link: https://marketplace.visualstudio.com/items?itemName=GitHub.copilot-chat

1. Enable chat.math.enabled
2. Type hello $(a+b)$ in Chat.
3. The math input is not rendered.

[tamuratak]

cc: @mjbvz