I’d be pushing hard to have the leather replaced if you are still under warranty. That’s a manufacturing fault not normal wear. As mentioned earlier it looks as though the stitch tensioning is incorrect and it’s tearing off the coloured layer.
If you look very closely at the photos you can see on the leather with the damaged colour layer that the grain of the leather has been smoothed out, (as if it has been "ironed") almost disappearing closer to the stitches themselves, unlike the panel it is stitched to. This smooth area runs the length of the seam and I am guessing about 10-15mm wide?
Methinks definite fault in the sewing process.
