Steps to reproduce:
1. Install Chenese (Taiwan) / Chinese (Traditional) Quick input method support
2. Run any Swing application with text area, for example, Notepad demo
3. Switch into Chinese and start typing into the text area
4. If you don't see IM candidate window while typing, the bug is reproduced
5. Deactivate window (click on the desktop)
6. Acivate window (click on the text area). Candidate window is shown
The problem is reproduced starting from 7.0-b02, so it may be related to 6359035. There is another change request about focus issues revealed by 6359035: 6542975 - but the fix for it doesn't solves this new problem with candidate window.