About three weeks ago received a Helicodiceros muscivorus from a certain well-known online nursery. It looked healthy when it got here. I repotted it and it seemed to be doing alright being kept moist in bright sun, but over the past week and a half, a couple of the smaller leaves yellowed and curled so I moved it to filtered sun. Two days ago, the entire plant flopped over in place. I poked around and didn't see any mold, so I propped it up the best I could and let it be. Today, it was flopped over again. I tugged gently on the leaves and they slid right out of the soil; the bases were mushy and yellow. All that is left is a single new, unfurled leaf which is upright and seems to be strongly attached. I quickly flipped the plant out of the pot and saw new root growth.

Am I doing something wrong, or is my plant just going through shock? This is my first experience with mail-order plants, so I don't know what's normal.