AskUserQuestion: attaching a note (n) to a selected option drops the selection, result says (no option selected)

Environment

• Claude Code 2.1.226, macOS, terminal TUI

Steps to reproduce

1. The model calls AskUserQuestion (single question, several options).
2. In the dialog, highlight one of the options.
3. Press n to attach a note and type a short note.
4. Press Enter to send.

Expected
The tool result carries both the selected option and the note.

Actual
The tool result reads:

"<question text>"=(no option selected) notes: <note text>

The note arrives but the selection is dropped, so the model has no idea which option was picked and has to re-ask the same question. The user, meanwhile, believes they answered it.

Selecting an option without a note works fine (dozens of rounds in the same session). Every answer that carried a note in this session arrived as (no option selected), so as far as we can tell a note always drops the selection.