Autocomplete suggestions leak between concurrent Claude Code sessions in different terminal windows

Description

When running two Claude Code sessions simultaneously in separate terminal windows for different projects, the autocomplete/typeahead suggestion from one session appears in the other, unrelated session.

Steps to reproduce

1. Open two terminal windows
2. Start Claude Code in each, working on different projects (different directories)
3. In one session, work on a task (e.g., "dark mode for edit application dialog")
4. Switch to the other session and start typing — the autocomplete suggestion from the first session appears

Expected behavior

Each Claude Code session should have isolated autocomplete suggestions scoped to its own project context.

Actual behavior

Autocomplete suggestion from another session/project appears. In my case, "dark mode for edit application dialog" (from a UI project) showed up in my backend-focused enterprise platform project (aiqarus) which has nothing to do with dark mode.

Environment

• Claude Code version: 2.1.34
• Model: Opus 4.6
• OS: macOS (Darwin 24.6.0)
• Terminal: Terminal.app
• Running two concurrent sessions in separate terminal windows, each in a different project directory

Screenshot

<img width="1441" height="804" alt="Image" src="https://github.com/user-attachments/assets/c2b0a2fe-0d8d-417c-adee-7b8c67f7a4b6" />

_Note: Screenshot shows the aiqarus project session with an unrelated "dark mode for edit application dialog" autocomplete suggestion at the input prompt._