Claude Code v2.1.9

Released Jan 16, 2026 (7 months ago).

"References this build" means the issue body mentions running 2.1.9 (from the bug-report template). It reflects report volume, not a proven defect count — an issue may mention a version without being caused by it. First-party data from the anthropics/claude-code tracker.

Top issues reported on v2.1.9

Ranked by community engagement (reactions and comments).

• [FEATURE] Change Default Plan Mode Exit Option
  Open 💬 15 👍 38 #18599
• Bug: /context command output appears temporarily then vanishes without trace (v2.1.9 regression)
  Open 💬 13 👍 37 #18562
• [BUG] Claude Code v2.1.9 Complete Freeze - 100% CPU, Main Thread Stuck in Infinite Loop (macOS ARM64)
  Open 💬 30 👍 30 #18532
• [BUG] Past conversations not showing in dropdown - sessions-index.json not being updated.
  Open 💬 23 👍 26 #18619
• [BUG] Bun v1.3.5 crashes on Windows with "integer does not fit in destination type" - prevents installation and startup
  Open 💬 40 👍 15 #18567
• [BUG] Token Limit Hard-Stop Without Warning or Auto-Compaction
  Open 💬 15 👍 18 #18705
• [BUG] Claude Cowork: `local_` prefixed session IDs rejected by API UUID validation
  Resolved 💬 18 👍 15 #18644
• [BUG] /context command doesn't load and causes screen flickers
  Resolved 💬 17 👍 15 #18488
• [BUG] /context command window flickers for 3-4 seconds then closes immediately
  Resolved 💬 8 👍 10 #18521
• [BUG] Plugin hooks registered but not firing in VSCode extension
  Resolved 💬 12 👍 8 #18547
• [BUG] 2.1.9 is unusable
  Resolved 💬 8 👍 6 #18559
• [BUG] Shift + Enter submits the prompt instead of inserting a newline
  Resolved 💬 5 👍 7 #18464
• Terminal display regression: Claude responses appear mid-conversation instead of at bottom when resuming session (iTerm2)
  Resolved 💬 10 👍 5 #18531
• [BUG] 2.1.9 regression: Uncontrolled request spam to /mcp and OAuth endpoints by Claude Code
  Resolved 💬 5 👍 5 #18701
• [BUG] <system-reminder> is instructing claude code to not follow claude.md instructions.
  Resolved 💬 5 👍 5 #18560
• [BUG] High Token Burn Due to Redundant Context Resubmission & Compaction Loops
  Resolved 💬 7 👍 4 #42647
• [BUG] Git commit with heredoc always fails on first attempt when sandbox is enabled - system prompt fights itself
  Resolved 💬 4 👍 5 #18713
• v2.1.12: SIGTRAP/PAC crash on Apple Silicon (arm64) during startup
  Resolved 💬 11 👍 2 #19360
• [BUG] Typing "/context" auto-selects "/compact" instead and pressing enter launches the compact function..
  Resolved 💬 6 👍 3 #18800
• [BUG] `claude mcp add` expands environment variable placeholders and writes resolved values to .mcp.json
  Resolved 💬 4 👍 3 #18692
• [BUG] Subagent search on ~/.claude causes multi-GB log bloat and /resume crash
  Resolved 💬 7 👍 2 #18682
• [Bug] Clipboard paste operation truncates data
  Resolved 💬 4 👍 3 #18672
• [BUG] - Read tool: Claude cannot interpret or see image content when reading image files
  Resolved 💬 7 👍 2 #18588
• [BUG] FileHistory bug: 4.2GB crash from parallel agents (Jan 2026)
  Resolved 💬 9 👍 1 #18687
• [Bug] Marketplace config JSON parsing hangs on empty files without error handling - cannot start claude when this happens
  Open 💬 5 👍 2 #19065
• [BUG] Error: Claude Code process exited with code 3221225477
  Resolved 💬 10 #18772
• [BUG] claude is optimized for wasting users time
  Resolved 💬 4 👍 2 #18620
• [Regression 2.1.9] max_tokens off-by-one: MAX_THINKING_TOKENS=64000 sends 64001 to API
  Resolved 💬 4 👍 2 #18554
• [Bug] Trace trap crash during project scan with large file directories
  Resolved 💬 4 👍 2 #18524
• Session JSONL files grow to multi-GB size due to bloated "progress" entries
  Resolved 💬 5 👍 1 #18905

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