Mobile app: composer draft is lost when navigating away from a session connected to local Claude Code

Description

When using the claude.ai mobile app connected to a local Claude Code instance (bridge session onto my own machine), the message composer does not preserve drafts across navigation. If I type a prompt — often a long, carefully written one — and then briefly switch to another page in the app (another session, the session list, etc.), the draft is gone when I return. There is no way to recover it; the prompt must be rewritten from scratch.

Steps to reproduce

1. On the mobile app, open a session that is bridged to a local Claude Code instance.
2. Type a multi-sentence prompt in the composer. Do not send it.
3. Navigate to another page in the app (e.g. open the session list or another chat).
4. Navigate back to the original session.

Expected

The composer still contains the unsent draft (per-session draft persistence, as is common in chat/messaging apps).

Actual

The composer is empty; the draft is silently discarded.

Impact

Long prompts composed on mobile are lost on any accidental or intentional navigation — switching sessions to check something mid-composition guarantees losing the work in progress.

Environment

• Claude Code v2.1.218 on Ubuntu 24.04 (session bridged from the claude.ai mobile app to the local machine)
• Reproduces consistently