with the new script that i received,i am facing the same issue,
if i try to exand the tree one by one,i am not able to
please give me any scrit which load the tree dynamically and upto 4 levels in a iterative manner
Problem is not reconstructable anymore.
Please be sure that old js file is not cached in your case.
If issue still occurs - please provide any kind of sample where problem can be reconstructed.