Hi,
That is not a bug that is a midi loop problem.
You have a track in Live that is sending the CC data back to the MB.
So lets say you move the knob, MM sends a value of 01 to live, then 02, then 03 etc.
Live is then sending 01, 02, 03 back to the MB, depending on the timing the MB will get reset back in time. So maybe it sends 01,02,03 and then gets the 01 back from live, the next time the MB sends out a 02 as it has been reset back to 01.
There are quite a few threads here now about ableton live and midi loops with the MB, might be worth you having a search for "midi loop"
Cheers
Andy