[Bug] Session state leakage between multiple Claude Code instances with Sonnet

Bug Description
Session state confusion between multiple Claude Code instances specifically with sonnet[1m] open in a different window
I can't re-open this issue:
https://github.com/anthropics/claude-code/issues/13089

But it's still happening. It's NOT a duplicate - this only happens when I have sonnet[1m] open in a different window.

Environment Info

• Platform: darwin
• Terminal: Apple_Terminal
• Version: 2.0.69
• Feedback ID: 851ba412-8791-4cb1-83e9-dacd73667657

Errors

[{"error":"Error: 429 {\"type\":\"error\",\"error\":{\"type\":\"rate_limit_error\",\"message\":\"This request would exceed your account's rate limit. Please try again later.\"},\"request_id\":\"req_011CW8iQMze41khZNJrLA8L6\"}\n    at I9.generate (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:458:10587)\n    at pR.makeStatusError (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:795:2195)\n    at pR.makeRequest (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:795:5419)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async feA.model (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:4235:11207)\n    at async feA (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:1220:18703)\n    at async xg2 (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:4235:11361)\n    at async file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:4235:3787\n    at async yd1 (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:945:2037)\n    at async dYA (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:4235:3757)","timestamp":"2025-12-15T15:32:23.091Z"},{"error":"Error: Request was aborted.\n    at ms._createMessage (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:462:3151)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)","timestamp":"2025-12-15T15:47:11.599Z"},{"error":"MaxFileReadTokenExceededError: File content (25242 tokens) exceeds maximum allowed tokens (25000). Please use offset and limit parameters to read specific portions of the file, or use the GrepTool to search for specific content.\n    at oWB (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:956:10569)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Object.call (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:965:897)\n    at async GF8 (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:1780:17096)","timestamp":"2025-12-15T16:13:22.036Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"max_tokens: Extra inputs are not permitted\"},\"request_id\":\"req_011CW8njUsNx7pPcovUkohng\"}\n    at I9.generate (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:458:10379)\n    at pR.makeStatusError (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:795:2195)\n    at pR.makeRequest (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:795:5419)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:945:3503\n    at async file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:945:2262\n    at async pL3 (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:944:16943)\n    at async LWB (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:945:2195)\n    at async RMA (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:1764:52)\n    at async yH8 (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:1764:2358)","timestamp":"2025-12-15T16:29:09.521Z"},{"error":"Error: Tool mcp__XcodeBuildMCP__build_sim not found\n    at vF2 (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:2597:542)\n    at K9 (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:213:21820)\n    at UB (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:213:38061)\n    at cT (file:///Users/alexanderriccio/.nvm/versions/node/v24.10.0/lib/node_modules/@anthropic-ai/clau

Note: Error logs were truncated.