It appears to be the front by the looks of the frame mounting (looks like the V from the tongue).
They look like fairly thin metal brackets (probably sure all of the LPI ones are) like mine are, so maybe too much load put on them? I know we were told not to try to pick up the camper with our power stabs, since they are just stabalizers, not levelers. Just go until both are firm on the ground, then just a little more for grandma and you should be good. I did make the big mistake last hookup and forgot to bring in the stabs before raising the tongue jack. Suprized mine don't look like that after that. I got the whole jack pad off the ground before the thought crossed my mind...