I have the same problem with my 2006 AF 1150. It has sheared that bolt dozens of times. I do not know why. I modified the thin plywood cover under the drawer that must be removed to access the bolt with a quick removal latch, (instead of the 4 screws) so I can change out the bolt in 5 minutes. I keep a bag full of them, and the proper wrenches in the drawer.
I will for sure be watching this to see if anyone has a cure.
2018 Eagle Cap 1163 triple slide, 400W solar, MPPT, on a 93 Dodge D350 Cummins, DTT 89 torque converter, big turbo, 3 extra main leafs, Rancho 9000s rear, Monroe gas magnums front, upper overloads removed, home made stableloads, bags.