Likely combination of environment change and natural leaf loss hastened on by the environmental change.
@pottie86 - I assume this was indoors in air conditioning? Or were they outside?
Certainly shield from the blasting all day sunlight. But Orientals do like sun, so don't protect it too much.
Frankly - that plant looks pretty good to me.
Being a "supermarket" plant who knows also how hard it was pushed to bloom. Often that stresses a plant and that may be a minor factor. Given where you are, I agree with Connie that this is blooming several months earlier than normal.
