I also face the bug. I think that the discussion made at http://stackoverflow.com/questions/30836201/jframe-wrong-location-with-ubuntu-unity can help understand and track the bug. The issue is that the behaviour is random. See my edit to detect when it happens.
I also face the bug. I think that the discussion made at http:// stackoverflow. com/questions/ 30836201/ jframe- wrong-location- with-ubuntu- unity can help understand and track the bug. The issue is that the behaviour is random. See my edit to detect when it happens.