Chat input bug: reference to sym lost when editing the text before the pasted sym

[ea167]

Version: 1.131.0
Commit: e4c7e7b
Date: 2026-07-28T10:51:25Z
Electron: 42.7.0
ElectronBuildId: 14710161
Chromium: 148.0.7778.280
Node.js: 24.18.0
V8: 14.8.178.38-electron.0
OS: Darwin arm64 25.5.0

Affects ALL LLM models

Steps to Reproduce:

1. Type in the chat input box
2. Paste a sym (copied from a VSCode editor)
3. Edit the text before the sym: it disappears