In the scene at the end of the film at his grandfather's empty lake house, Simon first unloaded the wooden Christmas figures from his duffel bag onto a pile of firewood on the end of the dock. He then went into his grandfather's workshop and sawed the scroll off of his mother's violin. With his phone, he took a picture of the severed scroll in his hand with the dock in the background, but the wooden Christmas figures now appear in the middle of the dock.
When Sabine arrives at the door, it is gently snowing and her black coat has some snow on it. Once she enters the house (a different set, her coat no longer has snow on it and the rate of snow, as seen through the window behind her, is at a much faster rate.