Why does my wooden cutting board warp after a single wash, even though I dry it immediately?

I recently bought a beautiful thick wooden cutting board made from maple, hoping it would last years. However, after just one wash, it started to warp noticeably. I always wash it by hand with warm water and mild soap, then dry it right away with a towel - never leave it soaking or in the dishwasher. I even tried oiling it a couple of times before use, but the warping still happened. The board sits on the counter when dry, not near any heat source. I’d love to keep it flat and usable without cracks or splits. Has anyone dealt with this kind of fast warping? Should I be using a different drying method or maybe conditioning it differently? What’s the best way to prevent wooden cutting boards from warping so quickly?