Those who have such play yards, will it move easily if baby pushes against it?

Ok weird. mine is this exact same model n doesn't really move when baby is holding on to it and I place above my playmat. it's not suction onto it at all. Unless I intentionally push it then it will move. as the shape is fixed. even if move also move slightly. I have tried lying down inside with the play yard n treat as my "backing" like the headboard of the bed...it doesn't move as well....so I'm puzzled abt the reviews here that most r moving...it feels very sturdy to me.