Thank you for the replies.
I have updated the firmware on both units. Yes I am using the MIDI cable and the IL picks up the clock. The light blinks in time, it starts and stops at the right place on cue from the BB. If I create a loop of 8 bars or so it keeps up just fine. I will create a rhythm guitar track going into one stereo input and then immediatley overdub a bass line using the POG octave pedal into the other stereo input. If I create a long loop that contains the verse and chorus of a song it does ok for two or three cycles and then on each reset it is more and more out of sync. I have tried many combinations of MIDI settings using the IL software and successfully sent them to the pedal, including the important “Turn off MIDI notes” setting. I am using Series mode, creating a short loop on Loop 1 for intro and the long loop on Loop 2. But I recreated the problem just using Loop 1. Sometimes it is worse than others. If I power down and reset everything that seems to help for a time.