bug in tree data reload

Hello , I have a tree with different data and when I reload data it works the first and second time , but not after ( “+” and “-” disappears), I try to illustrate an example for simulate the problem when we clicked on toggle button.

https://snippet.webix.com/oluivba9

Is it a bug ?

Hello,

Please add webix.copy (makes a deep copy of an object):
https://snippet.webix.com/qfk78h43

thanks , it’s work