Drag'n'Drop - When i drag an actor, it's shaking

Hi,

I’m trying to develop a little chessboard game. So to move a pawn, i used this tutorial:

With some actor, it works like a charm. But with other ones, the actor is shaking, even if i am not moving the mouse, the actor still moving between two point. It happens when i click on the actor. It does not follow correctly the cursor.
I hope you understand my problem.
Thx for your help :slight_smile: