Context usage pie chart shows identical value across all sessions, >50% on a fresh session (macOS desktop app)

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?

In the macOS desktop app, the context window usage indicator (the small pie chart in the bottom-right of each session) shows the same value for every session, regardless of each session's actual context usage.

• Sessions with very different amounts of context all display an identical pie chart.
• Even the new-session home screen (before any conversation starts) shows the same indicator, at more than 50% used.

Restarting the app does not change anything, and the app is on the latest version.

What Should Happen?

Each session's indicator should reflect that session's own context usage, and a brand-new session should show (near) zero usage.

Error Messages/Logs

Steps to Reproduce

1. Open the Claude desktop app on macOS
2. Open multiple sessions with clearly different context usage (e.g., one fresh session and one long session)
3. Compare the context usage pie chart in the bottom-right of each session
4. Also check the new-session home screen: it already shows more than 50% used despite having no conversation yet

All sessions (including a brand-new one) show the same value.

Claude Model

Not sure / Multiple models

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Desktop app 1.40609.0 (macOS)

Platform

Other

Operating System

macOS

Terminal/Shell

Other

Additional Information

• Environment: Claude desktop app for macOS, version 1.40609.0, on macOS 14.4 (Darwin 23.4.0). "Terminal/Shell" and "Platform" are set to Other because this happens in the desktop app UI (Claude subscription / Max plan), not in a terminal.
• Possibly related display issues: #66261 (indicator shows 94% while breakdown sums to ~17%), #51154 (random context usage at session start).
• I can attach screenshots on request: multiple sessions plus the new-session home screen all showing the identical >50% pie chart.