One place to look.....
There are the four brackets that form the four corners of the MFT. The leg assemblies attach to those brackets. There are several set screws that resemble the picture which tighten the aluminum profile pieces to the corner brackets. It is possible that one of those might have come loose in shipping.
I was folding up my MFT and while I was carrying it upside down, I thought of your picture, and thought... "what are the odds???"
Back to the shop....
BB