Several motor mounts have been broken in general. Nearly everyone I know that wheel's their X has broken one at one point or another.

There is some flex built into those mounts. A short peice of chain to act as a limiting strap has been suggested here, though no one has tried it. Spot weld it to the block and bolt it to the frame so the chain maxes out before the mount separates....same principle as the tie down strap.

When the one went at GONE last year on the factory X, the winch cable was wrapped under the truck to hold the motor in place. On Ivan's at this year's AZ run, we used a ratchet strap.

This is something worthy of a recall IMO.