queued messages and unsent input drafts are silently lost on session switch

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

On Claude Code on the web, in-progress notes are lost without warning:

1. A message submitted while the assistant is working (shown greyed/queued) disappears and is never actioned if I switch to another session before it’s processed. It is not persisted server-side.
2. Unsent text in the input box is gone after switching sessions, closing the tab, or an app restart — no autosave.

This is painful when juggling several sessions: notes typed while waiting vanish, and I lose the thread. Related: #61718, #44480, #55578.

What Should Happen?

queued messages persist and are delivered/actioned across a session switch; input drafts are saved per-session (locally at minimum) so they survive navigation.

Error Messages/Logs

Steps to Reproduce

A — Queued (submitted) message is lost:

1. Open a session on Claude Code on the web and give the assistant a task that takes a while to run.
2. While it is still working, type a note into the input box and submit it — it appears greyed/queued below the running turn.
3. Before the assistant reaches a pause and processes that queued message, switch to a different session.
4. Return to the first session.

→ Expected: the queued message is still there and gets actioned. Actual: it is gone and was never actioned.
B — Unsent draft is lost:

1. In any session, type text into the input box but do not submit it.
2. Switch to another session (or close/reopen the tab or app).
3. Return to the first session.

→ Expected: the draft is still in the input box. Actual: the input box is empty; the draft is gone.
Frequency: consistently reproducible.

Claude Model

Not sure / Multiple models

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.207

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_