Hi,
Never any problems, flying all three variants (319/20/21). I do it the way it was tought in TR course.
At 30ft I start to compensate the nose down trim with a small sidestick input, at 20ft I close the throttles and start the flare. When flaring the attitude of the a/c varies a bit with the weights so it is best to look outside and feel the V/S and altitude of the a/c by visual cues and just fly it all the way down.
If flying very heavy (321) I close throttles earlier around 40 to 50ft due to higher inertia and also start the above mentioned actions about 10ft earlier.
In heavy x-wind I fly it with crab and do the flare and while flaring at 10ft decrab it keeping wings level with sidestick (sometimes even banking against the wind).
Safe landings,
Olabade