It moves around under the hand somewhat (iPhone 13 Pro). The case fits the iPhone 13 Pro just perfect and the control until fits the back of the case. But even though the small button that mounts the control unt to the back of the case is fully pressed in, the control unit “wiggles” a bit under my hand.
Is the grip also slotted into the two mounting areas at the bottom of the case? Mine is super secure and doesn’t wiggle, so I wonder if that’s the issue.
That was it. My mistake. All good now.