How to add shadows for multiple 3D objects with move, scale and rotate gestures in ARSCNView ARKit

hello guys ,

Here i am trying to add mutiple 3d Objects in a ARSCNView (ARKit 3.0 & 2.0) along with move, scale and roate gestures , then i am getting conflicts with shadow planes (overlapping on other 3D objects while scaling) to recognize the gestures , and shadow postions . so give me any solutions to resolve this issue.

Thanks in advance.