Terminal display regression: Claude responses appear mid-conversation instead of at bottom when resuming session (iTerm2)

Environment

• Version affected: 2.1.9
• Last working version: 2.1.7
• Terminal: iTerm2
• OS: macOS

Description

After upgrading from Claude Code 2.1.7 to 2.1.9, when resuming to an existing session, conversation display order is completely broken. When I submit a prompt, Claude's response appears in the middle of the conversation (scrolled up) instead of at the bottom where it should be. This makes the tool unusable as I cannot follow the conversation flow.

Steps to reproduce

1. Install Claude Code 2.1.9
2. Open iTerm2
3. Resume to existing session
4. Start a conversation with any prompt
5. Observe that responses appear mid-screen/mid-conversation instead of appending at the bottom

Expected behavior

New prompts and responses should appear at the bottom of the conversation, maintaining chronological order (as in v2.1.7).

Actual behavior

Responses appear scattered in the middle of the conversation history, making it impossible to follow the dialogue.

Workaround

Downgrade to v2.1.7:

npm install -g @anthropic-ai/claude-code@2.1.7

Impact

Critical - the tool is unusable in this state. No configuration changes were made; the issue appeared immediately after upgrading.