Did you water it until you saw water coming out of the bottom of the pot? (Or maybe you have already done this and calculated how much water it needs).

Is it a hot windy day? Perhaps it cannot get the water up to the top fast enough. I'd give it another drink.

Lidna

sometimes, after a few cool overcast days, when the sun shines bright, new growth wilt a bit. But they will bounce back and get adjusted.
some wilting may be caused by lack of water too.

Yeah, if the mix is very fast draining, and the plant is large, it can dry out in a hurry and the plant will begin wilting from the top.......but recover very quickly after a good dousing.