Try to drag draggable over two droppables.
There are positions when they both are hovered though only one should be.
I think that only one droppable should be hovered because only one could receive this draggable so only one should show that it's waiting.
When you drop draggable into intersection of droppable1 and droppable2 (when they are hovered) only droppable1 will receive draggable though droppable2 is on top.
And droppable2 will be keeping hoverClass untill next dragging.