Don't like that at all and I can see why it would be a problem with a MOR/ryde pinbox.
The MR pinbox moves front to back and side to side in a circular motion (oval shaped). I can easily visualize that movement stressing those bolts.
I checked with Pullrite and they did not have a problem with the MORryde pinbox. If you think about it, MORryde cushions the movement on the bolts, like it cushions your ride.