Maybe a link to a sample video could help. If you are in stills mode/photo icon on the M2, LV will freeze because you need to take off RAW Video, restart camera, then disable Crop Mode in ML Tab 3. For Video Mode, it should work fine, try enabling release without shutter in the custom functions menu, although it's probably not related, it could help with other lenses if already not enabled. Otherwise, it chould be the shutter-bug issue which I have never encountered before.