Picked up this pubicalyx a week ago and have hung it on my West facing window (proch in front of window). I have yet to water it because it was quite damp when I picked it up.

Recently I have noticed two leaves emerging from a node but were suddenly dropped overnight, and some of the younger leaves and now an older one are getting these bumpy pattern....Any clue as to why that is and what is happening? Is it simply part of the acclimatization process or seller overwatering it? Thank you!!