[BUG] On Claude Desktop (Windows), Usage Spikes instantly without any cause

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?

Out of nowhere, there is a massive usage spike even when there isn't much usage at all when you start your 5-hour session window. For example, in the screenshot below, a single coding chat session caused this. There was no speed-boost or background tasks running - just a simple chat session with a simple prompt. This is a 20x Max plan by the way.

<img width="1337" height="611" alt="Image" src="https://github.com/user-attachments/assets/aac82351-d6f7-4876-a30f-883e5c569dd9" />

And a few minutes later:

<img width="1272" height="165" alt="Image" src="https://github.com/user-attachments/assets/9f217242-01f4-41e9-91fe-247795aba09a" />

What Should Happen?

Claude should not be eating away usage when there is no actual usage.

Error Messages/Logs

Steps to Reproduce

1. Use Claude Desktop (Windows)
2. Switch to Opus 4.7 Max
3. Run 1 or 2 Chat Sessions when starting your 5-hour consumption cycle
4. Observe the usage in the next few minutes

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.1.114

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_