Not sure if its the same thing,
im in 1st gear, rev to about 1000-1500rpm and slowly release clutch just above friction point. Car starts to wobble feels like left/right and feels like its going to stall but revs are at 1000+ let go more of clutch and accel and the wobbleness goes away.
Spoke to a gearbox/clutch specialist, said that the flywheel could be out of balance.
Does my problem sound anything similar to yours?