Whenever I use the Volley crossbow on Saltzpyre every time I swap to the weapon it will be automatically ADS’ing but still be in single shot mode and when fired like this it will stay this way the whole time whilst consistently jumping back and forth between hip fire and ADS animation. Quickly tapping the ADS button (Right-mouse button) will fix it but you will have to do it “every” time you swap to it.
Here is a Screenshot:
