[BUG] Notion MCP connector toggle doesn't persist — reverts to enabledInChat:false repeatedly

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?

The Notion MCP connector shows connected: true (account-level auth is fine) but enabledInChat: false for a specific chat session in Claude Code on the web. Toggling it on in that chat's connector settings works briefly, then silently reverts to enabledInChat: false again, with no error message shown. This happened 3 separate times in one ongoing session. The last two toggle attempts didn't take effect at all, even after sending a new message to force a refresh.

What Should Happen?

Once a connector is toggled on for a chat, it should stay enabled until the user explicitly disables it, and any failure to enable/persist it should surface a visible error rather than silently reporting enabledInChat: false with no explanation.

Error Messages/Logs

No error message was ever shown. Checking connector status returned:
{"name":"Notion","connected":true,"enabledInChat":false}
This was the result on every check, including immediately after toggling it on.

Steps to Reproduce

1. In a Claude Code on the web session, enable the Notion connector for the chat.
2. Use Notion tools successfully for a while (in my case, dozens of successful calls over an extended task).
3. At some point, Notion tools become unavailable with no error shown.
4. Checking connector status shows connected: true, enabledInChat: false.
5. Toggle the connector back on in the chat's own connector settings.
6. Send a new message and re-check status — enabledInChat is still false (reproduced twice), or it works briefly then reverts again (reproduced once).

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.251 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

Operating system: IPadOS