hairline cracks in board

[davidgibson1]

I have a nearly new elua makani mini mal. Some hairline cracks have appeared across the bottom of the board. I can just feel an edge with my nail. There is no yellowing of the foam core. This is my first board, so is this normal or is it going to snap in half. And no, its never been dropped in the car park, but a surf instructor did stand on it on the beach!