IF you have had water over 65 degrees and then at a later date it split. It will continue splitting as the polyurethanes has broken down.
Any Polyurethanes hose used with hot water and I don`t mean warm (over 65 degrees ) will breakdown and become stiff and eventually split or crack. The stiffening of a hot hose is just the start of it been stuffed. I have had my orange Gardeners since it came onto the market and is still not stiff, so don`t blame the manufacturer if its shot. Blame you own ignorance of the product properties you use.