Remote Control: typed text disappears from input field on mobile

Description

When using Remote Control from a mobile device (phone browser), text typed into the input field visually disappears before/during submission. The message is actually sent and processed correctly, but the UX is confusing because:

1. You type a message in the input field
2. The text disappears from the field (sometimes mid-typing, sometimes on submit)
3. The message does arrive and get processed by the Claude Code session

This happens consistently across different projects and sessions.

Environment

• Claude Code CLI: 2.1.81
• Host: Ubuntu 24.04 (headless server, persistent tmux session)
• Mobile: Android Chrome (latest)
• Settings: remoteControlAtStartup: true
• Hooks: UserPromptSubmit hook configured (task routing) — tested with and without, same behavior

Steps to Reproduce

1. Start Claude Code session on a server
2. Enable remote control (/remote-control)
3. Open the remote control URL on a mobile phone browser
4. Type a message in the input field
5. Observe: text disappears from the input field

Expected Behavior

Text should remain visible in the input field until submitted, and the input field should clear only after successful submission.

Actual Behavior

Text disappears from the input field unpredictably — sometimes while still typing, sometimes immediately after appearing. The message is still sent successfully despite the visual glitch.

Additional Context

This is used daily for managing infrastructure from a phone. The remote control feature is very useful but this input issue makes it frustrating to use — you can't see what you're typing or confirm it was sent without scrolling to see the response.