TreeGrid getOpenState and setOpenState seem to have problems

SmartClient Version: v9.1p_2014-03-20/PowerEdition Deployment (built 2014-03-20)
GWT 2.5.1
IE-11

I have a TreeGrid that is 3 levels deep. When do TreeGrid.getOpenState() the value coming back consistently misses the last node open.

And then when I re-apply the OpenState (with the identical data) the Tree does not open to the state when I did a TreeGrid.getOpenState().

This was working fine when we were on SmartGWT 2.x and seems to have broke since we upgraded to SmartGWT 4.1.