Rear flaps

… since a few days our CooperD enjoys driving over bumps (throwing holes, gulli lid etc.) with a flap that comes from behind. Thought it would be something in the trunk. But even after I have cleared the completely empty, the flap is still there. Also the tailgate is not, this rubber buffer has been screwed out a little further, flaps was still there. Over at the …info I have read about a defective rubber on the stabis of the rear axle, the so-called Has anyone ever had the problem with you? I hate it when something clatters on or in the car Heinz