RadzenTree checkedValues problem

Hello, guys!
I have a problem with RadzenTree...

When im initializing my component, I set checkedVales as values from my db- everything works fine.
Problem is that when I select few children elements of my parent during initialization- the parent is as 'unchecked' value.

'unchecked'- I mean this icon which is highlighted in red in the second screenshot- 'After ONLY expand 'Attributes''.

Only when I expand my parent- icon apears.

Before expand 'Attributes':

After ONLY expand 'Attributes':

I need the parent to have an icon without expand when any child element is selected during component initialization.
How can i do it?

Please, help me...

You can use ItemRender event as shown in our demo: