Full auto feels weird

Gunplay feel awesome though I can’t really get myself to use full-auto on weapons as they tend to do a burst first and then go into full-auto.
This is not only frustrating as you waste bullets often but also makes full-auto feeling a bit wacky and kinda unresponsive.
Also it seems that the bullet amount shot per burst is different on each weapon which makes it even more confusing to shoot them in full-auto.
I really hope that this is not intended and this is a bug.
In any case I would like to see full-auto shooting only one bullet if you just tap the mouse button rather then shooting a salvo first.