Following. I'm running Logic Pro X, and the Beatstep Pro is synced to Logic Pro X's tempo. MMC is off everywhere.
I can start and stop Logic from BSP *if* I'm not at measure 1. If I'm at measure 1, I get a loop and I have to disconnect the BSP.
Recording works intermittently (again, not measure 1). Sometimes recording will work, other times recording will start and stop, though playback will continue.