Claude Code v2.1.270

Released Sep 12, 2026 (1 day ago).

"References this build" means the issue body mentions running 2.1.270 (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 v2.1.270

Ranked by community engagement (reactions and comments).

• [BUG] [New Version Issue: v2.1.270] Random Session Expiry with reset time >5 hours beyond current time.
  Open 💬 3 #93955
• Response classifiers over-trigger on sensitive vocabulary in benign policy/philosophy discussion (keys on words, not intent)
  Open 💬 2 #94054
• [BUG] `claude attach` ignores CLAUDE_CODE_DISABLE_MOUSE and CLAUDE_CODE_DISABLE_MOUSE_CLICKS — mouse capture always on in attached background sessions
  Open 💬 1 #94029
• [BUG] Esc does not close /usage in iTerm2 (xterm-256color, no kitty protocol) on 2.1.270; q bound to confirm:no works
  Resolved 💬 1 #94027
• [BUG] Plugin manifest experimental.syntaxHighlighting.hljsLanguages validates but never registers a grammar
  Open 💬 1 #93944
• [BUG] ASP: Unable to apply provenance sandbox: 268451845, 20036, /Users/roywong/.local/share/claude/versions/2.1.270
  Resolved 💬 1 #93936
• [Bug] Token consumption spike after session reset
  Open 💬 0 #94200
• [Bug] Anthropic API Error: Router Admin Authentication Debugging Failed
  Open 💬 0 #94193
• Usage issue with existing model.
  Open 💬 0 #94192
• [Bug] Transcript Bypass Blocked: Unable to Disable "Send Transcript" When Submitting Bug Reports
  Open 💬 0 #94190
• [BUG] IDE context indicator ("In <filename>") never clears after deselecting text or closing the file
  Open 💬 0 #94189
• [Bug] Sub-agent orchestrators spawn redundant background polling loops instead of awaiting completion notifications
  Open 💬 0 #94178
• [BUG] Don't display "1 more" -- just display the node -- when showing the list of sub-agents at the bottom of the CLI
  Open 💬 0 #94176
• [BUG] /config shows a toggled setting as changed, with no error, when settings.json cannot be written
  Open 💬 0 #94173
• [Bug] Anthropic API Error: Safeguards flagging benign messages during reasoning extraction
  Open 💬 0 #94129
• [Bug][cyber] Legitimate requests falsely flagged by Anthropic API cyber safeguards
  Open 💬 0 #94078
• Windows: the shell configured in CLAUDE_CODE_GIT_BASH_PATH is never spawned; a discovered bash is used instead
  Open 💬 0 #94077
• [Feature Request] Improve safety guard calibration for legitimate firmware modification tasks
  Open 💬 0 #94068
• I need clarification on your issue to generate a proper GitHub issue title. Could you please describe: 1. What problem are you experiencing with Claude Code? 2. What is the error message or unexpected behavior? 3. What were you trying to do when this occu
  Open 💬 0 #94056
• Session dies permanently with `400 ... unexpected end of data` after a Bash result containing NUL bytes
  Open 💬 0 #94055
• [Bug] Manual approval of blocked action not persisting; [Credential Exploration] denial recurring on retry
  Open 💬 0 #94048
• Claude babysits a hung local typecheck for ~25 min instead of deferring to the project's CI gate
  Open 💬 0 #94042
• Worktree-isolated sessions still refuse Bash commands that never run git (2.1.270)
  Open 💬 0 #94040
• [BUG] Fork in remote controlled claude - web UI asks to update, but version is the latest
  Open 💬 0 #94034
• [BUG] /auto-mode-setup fails with "environment contains an entry with a control character" on clean environment
  Open 💬 0 #94033
• [Feature Request] Add persistent `/feedback` command reminder in CLI interface
  Open 💬 0 #94028
• [BUG] VS Code extension: renamed sessions revert to the auto-generated title
  Open 💬 0 #94017
• [Feature Request] Add rate limiting and cost controls for concurrent subagent spawning
  Open 💬 0 #94014
• Custom MCP connector (SSE, OAuth+DCR+PKCE) authorization fails on Claude Web/Desktop after server issues valid token — CLI succeeds with identical flow
  Open 💬 0 #94006
• [Feature Request] Session time limits too restrictive for extended coding sessions
  Open 💬 0 #93982

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