Multilevel Sidebar parse not working

https://snippet.webix.com/8f4a5vou
works fist time only then breaks.

It works without problems on latest Chrome.
It has to be something on your side.

Please make sure to wrap data in webix.copy() if you are going to parse it multiple times / to multiple components:

$$("MainSidebar").parse(webix.copy(MainSidebar_data2));

https://snippet.webix.com/k3ogqw0j

The components can modify data. In particular, hierarchical data will be converted to a linear set with hierarchy markers, that’s why it is not parsed correctly on a second button click.

Thanks Helga.
You’r the best.