Claude seems to be introduction more bugs and ruining previously excellent code

Preflight Checklist

• [x] I have searched existing issues for similar behavior reports
• [x] This report does NOT contain sensitive information (API keys, passwords, etc.)

Type of Behavior Issue

Claude modified files I didn't ask it to modify

What You Asked Claude to Do

I give instructions to fix something and it seems to mess up a different unrelated part of the code.

What Claude Actually Did

I give instructions to fix something and it seems to mess up a different unrelated part of the code.

Expected Behavior

Fix it like it used to

Files Affected

Permission Mode

Accept Edits was ON (auto-accepting changes)

Can You Reproduce This?

Yes, every time with the same prompt

Steps to Reproduce

_No response_

Claude Model

Sonnet

Relevant Conversation

Impact

Critical - Data loss or corrupted project

Claude Code Version

2.1.50 (Claude Code)

Platform

Anthropic API

Additional Context

_No response_