when I slave sync my unit to any source in the studio I get whats shown in the video which looks like the M+ trying to hunt for the correct tempo between a small range.
while the unit still seems to sync in a basic way the wavering is a big problem because it affects the tempo delays and the playback of any loops that use stretch or even re-pitch.
Ive tried all kinds of stable clocks and its the same issue, from mpc 3000 to other solid clocks it makes no difference, Ive also tried external USB midi interfaces, Im hoping someone can try this and let me know if theirs does it.. mine is the latest version, can't remember which but if I hit system tab it says 'up to date'