The Givi's have a crimped fitting on the front attachement point that can become loose and allow the bars to vibrate.
When I got my set, there was a burr in the fitting and I forced it a bit too much. The result was that the fitting came lose and started rotating. A bit of welding and it's fine. The tubing is thick enough that it can take a bit of penetration.
I do NOT know how safe it is to weld them while they are on the bike, several inches from the gas tank. I wouldn't do it. Best to punch mark them, take them off and put a couple of good welds. Problem "should" be solved.