Terminal scrollbar jumps to top during long sessions

Description

During long interactive sessions, the terminal scrollbar repeatedly jumps to the top, making it difficult to follow the conversation output.

Steps to reproduce

1. Start a Claude Code session
2. Work through multiple tool calls and responses (extended session with many interactions)
3. Observe the terminal scrollbar jumping to the top unpredictably

Expected behavior

The terminal should maintain scroll position at the bottom (most recent output) unless the user manually scrolls up.

Environment

• Claude Code version: 2.1.81
• Platform: Linux (Debian, kernel 6.1.0-44-amd64)
• Shell: bash
• Terminal: standard terminal emulator

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Reported via Claude Code itself, at user request.