Cannot use OpenCode

Description
OpenCode desktop app (v1.18.21) stops responding after sending a query. The UI shows nothing. This occurs with both Go (paid) and Zen (free) models. The issue persists after restarting the app and the computer.

Plugins
All plugins are disabled. No third-party extensions installed.

OpenCode version
OpenCode desktop app (v1.18.21)

Steps to Reproduce

1. Launch OpenCode desktop app.
2. Select any model (e.g., deepseek-v4-flash).
3. Send a query.
4. No output is generated. The app remains stuck in "Thinking..." state.

Expected Behavior
The app should return a response from the selected model.

Actual Behavior
The app hangs indefinitely with no error message.

Environment

• OS: Windows 11
• OpenCode Version: 1.18.21
• Network: Direct connection or VPN/proxy

Additional Context

• This issue started on August 24, 2026.
• I have already tried clearing cache and disabling plugins.
• Switching models does not resolve the issue.
• The issue is reproducible 100% of the time.here is no response or feedback after I ask a question, and the same issue occurs even after switching models. It is unusable.