I just wondered if it was something I might be doing wrong when I hold the footswitch down to change the parts of a song. I see the screen turn white for transition but every so often after I release it stays on the same part. After experimentation it makes no difference if I hold for just one bar or even up to four.,it can still just cut off and not advance.
It would be helpful to know which version of the firmware is installed on your pedal along with your setting.
Otherwise, this link will help Search results for 'Transition' - Singular Sound Forum