I'm noticing when sending MIDI clock for the delay to sync to, the Delays (Delay, BBD, Tape1+2, etc) all have a hard time with it, and it sounds like tape wow+flutter and sometimes glitching, not beat sync'd delays as expected. With CLK SYNC unchecked, it works as expected.
I've tried with MIDI clocks from Cakewalk Sonar and Roland TR-8S