It may also be related to the issue I currently have on my Yamaha, which has the factory top-opening panniers and the 52L Givi trekker top box. The box is so wide that you can't open the panniers with the top box fitted as the box overhangs the pannier lids. The Yamaha top box is narrower, so doesn't have the problem. To be safe, either go all Givi or all Suzuki to be sure of compatibility. I seldom use my panniers but the top box is essential for me. If anything changes for me in future and find I need panniers too, I will buy Givi side opening ones to match the top box.