YM
Welcome to our forum.
What you described is well known and already discussed about 10 years ago.
LUC movements were designed to be very precise and ALL watches with seconds hand are subjected to COSC testing.
The pinions (gears) have tooth profiles and meshing with tight tolerances so the hand has to 'settle' into a gap or the adjacent gap when the crown is pushed in. In theory, there are three possible outcomes:
1) no movement because the hand is aligned with a gap between teeth.
2) movement backwards on hitting a tooth to the gap behind.
3) movement forwards on hitting a tooth to the gap ahead.
The gears could have been made "sloppier" but I'm glad they did not choose that design route. Your watch was adjusted at the Manufacture to chronometry limits that are tighter than COSC standards.
Since, you have found mostly forward movement, your natural push action must be imperceptibly biased with a forward twist.
Solution:
Knowing your own watch and finger touch, try applying very slight back-pressure on the crown to keep the hand aligned on the marker as you push the crown in. Within a few tries, you will get it perfect: "Mischief Managed".
Regards,
MTF