yes, I also stutter in dreams. you probably don't remember because remembering the details of dreams is very difficult. For a long time (I still think about it) I believed that mastering dreams would be a door to cure yourself from stuttering, because if you still stutter in dreams it means that you believe too much that it is impossible for you not to stutter. From this perspective, fluency would be confronted by yourself, you would push it away yourself.