Draggable AutoScroll does not show the top (first) node or show half of the node.

[boyandim]

Bug report

Kendo UI TreeView autoScroll sometimes does not show the top (first) node or show half of the node.

Reproduction of the problem

The problem can be replicated with http://dojo.telerik.com/uCuZUS/3 example.

1. Drag a child item of the Storage node to top

Current behavior

Sometimes when a child item of the "Storage" is dragged over to the upper part of the scrollable container (in order to scroll and eventually shows the "Furniture" node) it stops without reaching the top part of the scrollable container. The "Furniture" is cut in half or not shown at all.

Expected/desired behavior

The Furniture node should be shown completely.

Environment

• Kendo UI version: 2019.1.115
• jQuery version: 1.12.3
• Browser: all

[dmanova]

Seems to be fixed with #3289