Tree elements dissapear on click

Got a small problem with Tree , eachtime i click on one of the elements it dissapear ( turns white ) .

Snippet : http://webix.com/snippet/8ae94a04.

What could cause that problem ?

Fixed by adding “span” “/span” to ‘values’

http://webix.com/snippet/d611a424

Yep, for now<span> is necessary for a custom template to apply the background of the webix_selected class.