Problem on ExpandableListView

[xmflsdede]

I'm developing an App using Viewflow which is awesome, but recently I've got a problem while implementing ExpandableListView inside viewflow. The problem is when I click on the group item, the group indicator changed (which indicates the children should be expanded), but the children views are not expanded until I manually scroll up/down on the ExpandableListView. I've test the exact same code on a plain activity without viewflow which works fine. Could plz help me out?:)

[xmflsdede]

After I pass the ExpandableListView as variable into my own adapter and call smoothScrollBy everytime on onGroupCollapsed() and onGroupExpanded(), the problem will be solved. I figure it might be caused by viewflow refresh timing. Plz check it out.