onCanvasDrag change offset in state

[outianleiz]

Normally offset in state is {x:number, y:number}. However, after I dragged the canvas. the offset will set to be like
offset:{
deltaX: -1
deltaY: 0
lastX: 32
lastY: -78
node: div.sc-bdVaJa.doHFhw.react-draggable.react-draggable-dragged
x: 31
y: -7
}
is this expected? I thought offset will stay like {x:number, y:number}