Steps to Reproduce

1. run attached zul with attached composer and class
2. open several Treeitems
3. close them one by one

Actual Result

In closing Treeitems, I found some treeitems cannot be closed in one click. I need to click 2 or more times to close it.

you can watch the video to see how I reproduce it.

Debug Information

• The issue happens only on version after 7.0.3.FL.20140801-Eval because of fix for ZK-2375
• If you remove the code below inside attached TreeRendererTest.java

  treeItem.setOpen(row.open); 
  		
  		// With this we ensure the row can be opened after its updated
  		DefaultTreeModel model = (DefaultTreeModel) treeItem.getTree().getModel();
  		if (row.open)
  			model.addOpenObject(data);	
  

  Then the issue will happen in less frequency, but still happens especially if you close a treeitem when multiple treeitems are open already.