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hermes - 💡(How to fix) Fix TUI input box disappears after assistant response, leaving only session summary

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After the assistant finishes responding, the TUI input box sometimes disappears entirely. The only thing visible at the bottom is a session summary line (title + timestamp). The user can no longer type any input and must restart the session.

The backend agent loop is healthy -- turn ends normally (text_response) and agent enters waiting-for-input state. But the Ink/React frontend no longer renders the input component.

Root Cause

After the assistant finishes responding, the TUI input box sometimes disappears entirely. The only thing visible at the bottom is a session summary line (title + timestamp). The user can no longer type any input and must restart the session.

The backend agent loop is healthy -- turn ends normally (text_response) and agent enters waiting-for-input state. But the Ink/React frontend no longer renders the input component.

Code Example

14:13:18  User sends message
14:13:27  Assistant replies, turn ends normally (no errors)
          TUI input box gone, only session summary visible at bottom
RAW_BUFFERClick to expand / collapse

Description

After the assistant finishes responding, the TUI input box sometimes disappears entirely. The only thing visible at the bottom is a session summary line (title + timestamp). The user can no longer type any input and must restart the session.

The backend agent loop is healthy -- turn ends normally (text_response) and agent enters waiting-for-input state. But the Ink/React frontend no longer renders the input component.

Environment

  • Hermes v0.15.1
  • macOS 26.5 (arm64)
  • Native Terminal.app (not tmux)
  • Model: deepseek-v4-pro

Reproduction

Not reliably reproducible. Occurred in session 20260530_140015_8b7535. Timeline from agent.log:

14:13:18  User sends message
14:13:27  Assistant replies, turn ends normally (no errors)
          TUI input box gone, only session summary visible at bottom

No errors in agent.log, errors.log, or gateway.log at the time of the incident.

Expected behavior

Input box should remain visible and functional after assistant response.

Notes

  • A background review agent ran earlier in the same session (14:10:10-14:10:57) but completed before the last user message
  • The session summary shown at bottom appears to be title + start time
  • Similar to #32517 (TUI loses input in tmux on Linux) but this is on macOS native terminal

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FAQ

Expected behavior

Input box should remain visible and functional after assistant response.

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hermes - 💡(How to fix) Fix TUI input box disappears after assistant response, leaving only session summary