Desktop app on macOS text substitution breaks cursor position in prompt input

[colus001]

Description

When typing in the prompt input (normal mode), macOS (desktop app) text substitution (e.g. --- → —) causes the cursor position to jump unexpectedly. The text replacement itself is a minor annoyance, but the real issue is that it disrupts cursor tracking, making the input difficult to use.

Plugins

No response

OpenCode version

1.2.27

Steps to reproduce

1. Open the app on macOS with text substitution enabled (System Settings → Keyboard → Text Replacements)
2. Focus the prompt input in normal mode
3. Type --- (three consecutive hyphens)
4. Trying to type anything and observe that macOS replaces --- with — and the cursor position jumps to near ---'s original cursor

Screenshot and/or share link

Operating System

macOS 26.3.1

Terminal

iTerm2

[charafmrah]

Facing the same issue here