[BUG] Claude Code Web fully ignores plan changes and always approves original plan, plan mode switch broken

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 web version, I tried the "plan mode", noticed that it is extremely buggy:

• after Claude suggested the plan, I typed my edit suggestion in a text field bellow the "approve" button. I typed what I did not like about the plan, Claude completely ignored this text and proceeded implementing the original plan.
• I tried to ask Claude to suggest me a "test plan" so I can test the issue even more, but all the next "plans" were auto-approved without even asking me (see pic)
• Claude responds that "ExitPlanMode is erroring out — I'm not in plan mode. The first time it appeared to work was likely because the session started in plan mode (via /plan). Now that we've moved past that, it no longer works."
• The plan mode switch on the page is still active all this time.
• In another session even when I turned the switch off in the middle of the session, it kept suggesting me new plan before implementing the changes

What Should Happen?

Claude should respect plan mode switch and suggested plan corrections, auto-approval should be fixed

Error Messages/Logs

Steps to Reproduce

Ask Claude Web to implement something in plan mode, then criticize it, look it if it changed anything, stop it, try again in response

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

claude 2.1.81 (Claude Code)

Platform

Other

Operating System

Other

Terminal/Shell

Other

Additional Information

<img width="734" height="755" alt="Image" src="https://github.com/user-attachments/assets/6b57a9e4-46ea-42f4-978d-d640009d9a51" />
Browser: Firefox (latest), mac os