Hey what version is your BB on?
You must be on 3.9.9 or later to be able to send the Transition Start (CC113 value 1-32) and Transition complete (CC113 value 0) commands at the same time. You must always send the CC113 value 0 command to stop the transition from looping and start the part. Otherwise, you have to select the part on the press and send the CC113 value 0 command on the release.
Let me know if this is helpful!