React Error #185: Maximum update depth exceeded when running multiple parallel Task agents

Description

When running 6+ parallel Task tool calls (subagents) simultaneously, Claude Code's terminal UI (React/Ink) crashes with:

\\\
ERROR Minified React error #185; visit https://react.dev/errors/185
\\\

React Error #185 = "Maximum update depth exceeded. This can happen when a component repeatedly calls setState inside componentWillUpdate or componentDidUpdate."

Steps to Reproduce

1. Create a skill that launches 6 parallel Task agents in a single message
2. Each Task agent is a \general-purpose\ subagent doing file analysis (Read/Grep/Glob heavy)
3. All 6 agents produce output simultaneously
4. Claude Code UI crashes with the React error

Expected Behavior

Claude Code should handle multiple parallel Task agents without UI crash.

Actual Behavior

The React/Ink terminal UI enters an infinite re-render loop, presumably from too many concurrent state updates from parallel agent outputs.

Environment

• Platform: Windows 10 Pro (WSL2/Git Bash)
• Claude Code: Latest (via Bun)
• Model: claude-opus-4-6
• The crash originates from \B:/~BUN/root/claude.exe:679\

Workaround

Reducing parallel agent count to 2-3 instead of 6+ appears to avoid the crash. Using \run_in_background: true\ on Task agents may also help.

Suggestion

Consider throttling/batching React state updates from concurrent Task agent outputs, or using \requestAnimationFrame\/\unstable_batchedUpdates\ to coalesce rapid state changes.