I assume this is a bug. Two things now happen when fighting mobs and shooting them with my rifle.
1) The rifle almost always fires twice, one is always a phantom shot and doesn't seem to even use ammo. Definitely no damage.
That one has existed a while.
2) Suddenly my rifle will start firing fast over and over and over again, but it's another phantom shot. The problem with this is, I'm getting shot several times in a row by the Mob I'm attacking, and I've even died from this. After several shots, suddenly one real shot will fire and the effect goes away until the next time it decides to rear it's ugly head..
Both of these waste valuable fight time and could cost a character their life, but the second is really deadly because it's a prolonged amount of time where you're not doing a single drop of damage and the mob is pounding the snot out of you..
I died needing 1k of experience to level in a mission last night to a "gray" because of this bug