[Bug] Claude Code performance degradation on claude-opus-4-1 with high effort settings

Bug Description
Claude got dumper, even on Opus 4.7 Effort Max

Environment Info

• Platform: darwin
• Terminal: vscode
• Version: 2.1.119
• Feedback ID: ab7f59b1-a12e-4096-8bbc-a9ddd3fe94ae

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/liemlhd/.local/share/claude/versions/2.1.119 (expected in multi-process scenarios)\n    at mH6 (/$bunfs/root/src/entrypoints/cli.js:2736:2177)\n    at E$8 (/$bunfs/root/src/entrypoints/cli.js:2736:1257)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-27T10:01:06.714Z"}]