That happened to me too in the past week after transplanting. And it looks like the moonflower that turned white is about dead. :( Moonflowers seem to be very temperamental.

Did your plants survive? I put some in the ground a few days ago and many of the leaves are turning white and paper-thin. I don't know whether it's the cold nights (48 F), direct sun, or who knows what else!

Yes they survived. I thought at first it was the direct sunlight also but now I'm thinking it is the cold nights because, like you, my nights were getting down below 50. Now its warm and they are doing so much better. They only grew like 4 inches but they are starting to vine now so hopefully they will take off!

Mine are climbing but still losing lower leaves. The fact that they're growing is encouraging, though. I'm glad yours recovered!