kidsXmlFile expand/collapse

I am having issue with kidsXmlFile with only one childnode.
When I click on a row which has only one child row, clicking + will expand the child row correctly, but then clicking – will NEVER collapse the node.
It is collapsing, but it is calling it again to expand.
OpenEndHandler is called twice.
(This only happens with a node with ONE child row)
Does anybody know how to solve this?

Unfortunately we cannot reproduce this issue locally. Please open ticket at and provide complete demo where we can reproduce this issue.