[Bug] Anthropic API Error: Unresolved Tool Use Block During Subagent Operations

Bug Description
Sending a regular request during subagent operations results in the main thread being unavailable due to mismatched blocks in history:  API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages.16: tool_use ids were found without tool_result blocks immediately after:
toolu_01HciFHfXKrGd8azz5reUmZ8. Each tool_use block must have a corresponding tool_result block in the next message."},"request_id":"req_011CTnznZhocNMc7fvCrhEDt"}

Environment Info

• Platform: linux
• Terminal: konsole
• Version: 2.0.5
• Feedback ID: e34e9dc8-a809-4ebc-9a51-b5588d25e8de

Errors

[{"error":"AxiosError: Request failed with status code 401\n    at fN (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:715:1077)\n    at IncomingMessage.z0 (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:716:9955)\n    at IncomingMessage.emit (node:events:520:35)\n    at IncomingMessage.emit (node:domain:489:12)\n    at endReadableNT (node:internal/streams/readable:1701:12)\n    at process.processTicksAndRejections (node:internal/process/task_queues:90:21)\n    at vQ1.request (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:718:2088)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async YWA (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:891:25807)","timestamp":"2025-10-04T22:51:33.070Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at QK (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1741:1183)\n    at file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1741:911\n    at Array.map (<anonymous>)\n    at xX (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1741:902)\n    at cJB (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2847:9380)\n    at CC (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:34:19415)\n    at Fp (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:42814)\n    at I9 (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38355)\n    at Ch (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38283)\n    at TC (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38137)","timestamp":"2025-10-04T22:53:48.440Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at QK (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1741:1183)\n    at file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1741:911\n    at Array.map (<anonymous>)\n    at xX (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1741:902)\n    at cJB (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2847:9380)\n    at CC (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:34:19415)\n    at Fp (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:42814)\n    at I9 (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38355)\n    at Ch (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38283)\n    at TC (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38137)","timestamp":"2025-10-04T22:54:14.099Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at QK (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1741:1183)\n    at file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1741:911\n    at Array.map (<anonymous>)\n    at xX (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1741:902)\n    at cJB (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2847:9380)\n    at CC (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:34:19415)\n    at Fp (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:42814)\n    at I9 (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38355)\n    at Ch (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38283)\n    at TC (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38137)","timestamp":"2025-10-04T22:57:34.593Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: cypher\n    at QK (file:///home/aaron/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1741:1183)\n    at file:

Note: Error logs were truncated.