Expand Tree

I’m using the grid tree and upon load, the nodes are all collapsed. When I click on the + sign, sometimes the tree will expand and sometimes it won’t. Is there a way to force the node to expand if the + is clicked?


If branch has child items it will  expand on clicking “+” sign in any case, without exceptions.
Please be sure that you have unique IDs for each element in tree, non unique IDs may cause similar problems.