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MultiSelect Checkbox selects all options unintentionally when navigating with keyboard after interacting with

When using keyboard navigation within the MultiSelect component (with checkbox mode enabled), the focus state does not correctly update when navigating away from the "Select All" item. The spacebar incorrectly triggers "Select All" rather than toggling the selected item.   

 If the user repeats the process but moves the focus up one more time before selecting, the issue does not occur — indicating that the internal focus or selection state is not updated correctly after the first interaction.
Simple Sample: https://stackblitz.com/edit/d2wvbqxt-tbxrdjt4?file=index.js,index.html

Replication Procedure:
  1. Opens the dropdown
  2. Navigates down using the arrow key
  3. Moves back up and focuses the "Select All"  selecting it and deselecting using space bar.

Expected Output:
Only the specific item should be selected.
Current Output:
All items are selected instead, as if "Select All" was triggered again.