I'm having the same problem, and my cuttings are in shade under a larger in-ground fig (they get little spots of light filtering down through the leaves throughout the day). I had 100% success getting leaves and roots, and moved the cuttings outside when I continued to get occasional mold and leaf-drop in the aquarium I had used to boost humidity. I surrounded the cuttings with a low fence of chicken wire and plastic sheeting to keep critters from eating them and winds from drying them out (open top), and they didn't show any signs of wilting at being moved. Most are growing well, and no mold has appeared since getting them outdoors.
However, every few days, for no apparent reason, a cutting will abruptly wilt and die, and I'm starting to get nervous. They're still in their bags (except for a few I rooted in soda bottle "pots"), and I'm watering every three or four days. They're in a light mix (mostly perlite, but packed into the bag pretty firmly) and the water runs right through. At first I thought the "sudden death syndrome" was happening right after watering, but now it doesn't seem to be correlated. I don't think it's too much sun because I kept some of them on an east window sill where they got the full blast of direct Tucson morning sun, and they seemed to love it.
Most of the cuttings show pretty severe FMV, but that doesn't seem to be correlated either. Several times now, with two bagged cuttings (from the same original "stick" that had been cut in half to double my chances) sitting in the same plastic pot (just to hold the bags upright), getting identical water and identical conditions, one will die and the other one keeps growing without a hitch--at least for now. Any ideas about why this is happening would be much appreciated.