Tumbler's currentIndex is not working when the model is changed at runtime

When model is changed at runtime currentIndex is defaulting back to 0, ignoring the user assigned value.

Also on explicitly setting currentIndex to some other value "onModelChanged" slot, only the value is updated but view is not updated and still currentIndex is at 0th index. Checked the same in "ListView", it works as expected there, i.e, currentIndex updates in the view also.

Attached example reproduces the issue.