It was the next day when I was cutting the loaf into bars and noticed the cocoa powder color had disappeared. There was a thin brown ring around the outside perimeter the bar, but the rest of the bar didn't have any color..it was all beige. I was stumped...thought this was going to be another "fail", so to speak. I finished cutting the bars, and a few hours later when I checked on them, the cocoa powder-colored layers had returned! I've never had cocoa powder disappear when doing a swirl with it, so I guess I just find it odd that this happened.