[Bug] Prompt box `--name` label renders inconsistently in concurrent sessions

Bug Description
Title: --name display name missing from prompt box on some windows (v2.1.118) claude --help documents -n, --name <name> as "shown in the prompt box, /resume picker, and terminal title". However the prompt-box label is intermittently absent. Environment: - Claude Code v2.1.118 - macOS Darwin 25.4.0, tmux (status off, automatic-rename off) - 3 concurrent Claude instances with different --name values: claude --name "<project-a>/main - Claude" claude --name "<project-b>/<branch> - Claude" claude --name "<project-c>/main - Claude" Reproduction: 1. Start multiple sessions above in separate tmux windows 2. Switch between windows and observe the prompt box Expected: the --name value is always rendered as a label above the input box. Actual: the label appears on some windows and not others, with no obvious trigger. Compared two screenshots where the only difference is: one shows "Cooked for Xm Ys" (label visible), the other shows "Worked for Xm Ys" + N tasks summary (label hidden). Terminal width, Image in clipboard indicator state, and input-box emptiness are identical. No related option found in settings.json docs or CHANGELOG. Cannot find a user-controlled way to force-show the label.

Environment Info

• Platform: darwin
• Terminal: tmux
• Version: 2.1.118
• Feedback ID: f73640ee-58bb-4dfe-b1e2-92d130ab6a03

Errors

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