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Claude Code Issues / #22256

[Bug] CPU spinning when idle or blocked on I/O

Status Closed — not planned
Reported on v2.1.27
Maintainer reply None cached
Activity 4 comments · opened Jan 31, 2026 · closed Mar 2, 2026

Bug Description

During a normal conversation, Claude Code can become unresponsive while waiting for output. The process consumes 100% CPU and never recovers.

Environment Info

  • Platform: darwin
  • Terminal: Ghostty
  • Version: 2.1.27
  • Feedback ID: 7efdc831-d6b8-480e-9133-21278e1935e4
  • OS Version: macOS 26.2 (Build 25C56)
  • Architecture: arm64e

See attached samples of two different invocations

Sample of 2.1.27.txt

Sample of 2.1.27-2.txt

View original on GitHub ↗

This issue has 4 comments on GitHub. Read the full discussion on GitHub ↗

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