Bug with 'firstCurrentState'

statechart_bug.js

var MyApp = window.MyApp = SC.Object.create();

MyApp.mixin(SC.StatechartManager, {
  trace: YES,
  initialState: 'stateA',

  stateA: SC.State.design({
    substatesAreConcurrent: YES,
    stateC: SC.State.design({
      initialSubstate: 'stateD',
      stateD: SC.State.design()
    })
  }),

  stateB: SC.State.design()

});

MyApp.getPath('firstCurrentState.name');
// -> 'stateD'                                                                                       

MyApp.gotoState('stateB');

MyApp.getPath('firstCurrentState.name');
// -> 'stateD' (should be 'stateB')                                                                  

MyApp.get('currentStates').getEach('name');
// -> ['stateB']