Was it sitting in full sun while potted?
I had a similar issue once when putting a young plant about that size whose leaves were developed in indirect sun, into open sun. He dropped the old leaves, went into shock for a bit, and then produced newer, deeper green foliage and came back fuller and thicker just fine.
I imagine you had 5 things: cold, water, wet feet and sun on light green foliage all at once while just overcoming transplanting.
Seems pretty normal, and other than some leaves and possible branch tips, it should be fine.