Ionic-3 Dragula removing the CSS style of the card while dragging it.

I’m trying to use the Dragula module and I’m able to reorder my cards, but at that time I choose a card to drag, while dragging on any card, they lose their own CSS styles in drag and drop operations.
“I said that I am using the dragula to move the card up and down, when I drag any card, Then it remove card CSS style which is implemented by using the CSS style class. Please help me to drag the card with its CSS style.”