Some wilting is possible but limiting the amount of foliage per cutting & increasing the frequencyof misting will solve this problem (but not reverse it)
once the cutting is dead only GOD can revive it

Wilting is normal since the cuttings don't have roots.

Quite a few of the cuttings I do will lose some of their leaves just before or right around the time they strike root. Buddleia does this. In about a week you should see new growth.