Bed puppy won’t pee on?

My girl dog is 3 months old. She’s very good at potty training and rarely goes inside, when she does, she always goes on the brand new bed that we got her. She won’t go on the carpet, just the bed that we have on the floor to relax on. (Different than the crate) 1) the bed has a furry material, could this be why? 2) what kind of bed can I get here where she won’t do this?