Hi, are you on the latest version 4.0.1? You can verify what version you are currently on in the Main Menu (press both the Drum Set and Tempo knobs at the same time) and go to the About BeatBuddy option.
If you are, and you are using MIDI, make sure you are sending both the CC113 value 1-32 command followed by a CC113 value 0 command. CC113 value 0 is the complete transition command, without it, the BB will be stuck in the transition until it receives it.
If you have done all the above and are still having issues, please write to support@singularsound.com at your earliest convenience for more help here.
Thanks for the question!