Slow scratch distortion

Hi Pioneer's team..i've noticed that when i use the jog to launch a song and slowly spin forward and reverse to launch in time the song the sound is a little bit distorted,you can hear specially with vocals intro..think is an optimization affair of the audio engine\stratch,i've experienced similar issue with other sw(ok,Serato)that was solved with newer versions and update of the program so i think is the same for RB that is a more "young" software..but is great!so please keep to grow up and update! :)