Pistol Aerial

In the short range version of this Gunslinger ability, the shot after the jumping back is vacant so the attacker freezes instead of performing the animation. The shot sound is vacant aswell, so you can hear only the bullets hitting the victim.
How long as this bug been around? Since CR 2.0 or also before?

Apart from that, I've noticed that anytime I performed this ability, I pull a single gun (strangely each time of another pistol type than the one I'm actually using), the other one being empty while it's clearly designed to not to be. That doesn't depend on whether I'm using single or dual weapons.
The NPCs also have this bug, but only those using single pistols. Those with the dual pistols have both weapons in their hands each time.

Now my question, does anyone know when my character can perform this ability with two guns (visually)? Is that possible at all?