Treebase getRowChildren returning wrong results

The getRowChildren() function on the treebase control seems to be returning unexpected rows when a row processor is registered for filtering. The issue can be reproduced in the following plunker. http://plnkr.co/edit/xHfc63yZWdgr1O3qYjIm

On the plunker, type "josh" and press the "Log First Group Visible Rows" button. Notice that in the console, 3 rows will be logged, 2 of which actually belong to the first group, but you will notice that there is an entity in there that isn't even a part of this group, yet getRowChildren is stating that this is a child of that row.