You shouldnt hold down on the shifter when shifting between gears or out of neutral. From N push down and let up, give it gas when you want to go. you can come to a stop in 3rd gear if you want and bike it idle. If you do that it will be a little hard to get back into N or 1st and might need to rock the bike back and forth.
This looks like a typo. Actually, you
should hold the shifter, momentarily, when changing gears or going from neutral to first gear.
The semiautomatic clutch is just a mechanical clutch, once under way. At low rpm, it's a centrifugal clutch; that's why you can idle in gear. When the shifter lever is depressed, in either direction, the clutch is disengaged the same as if you were squeezing a hand lever....via an integrated cam plate assembly. Most riders just snap the shifter, on gear changes...making virtually clutchless shifts, then wondering why the bike lurches. Learn how to modulate shift lever release + throttle aplication and you'll soon be able to execute silky-smooth shifts...same as if you had a fully manual clutch and hand lever.