Too much stress on new airlayer. Too much heat, being cut, sun ,etc. Keep them cool and shaded for a few days. It will probably shed some leaves. Usually if I have an airlayer that grew too many leaves in relation to the rootball. I clip some leaves off several day prior to cutting the layer off. This gives the remainder of the stem time to fall off and heal before stressing the new plant again. When you cut after the fact it loses lots of moisture though the new cuts in the stems. A good time to cut airlayers off is during a few days of rain or cloudy weather or cooler than normal temps.
By the way, they will survive. Sounds like you have nice rootballs. If you have a cool basement put them in there.