Edit 2: happens consistently on bap, lucio, mercy pistol on first shot only, and mercy heal beam with or without target. Admittedly this might be a driver/performance issue.
Scoped and unscoped, for all except zen and mei every single time. Dunno if I’m just lagging every time I fire but that’d probably deserve mention too then. For zen it only happens when firing from the rest animation.
Happens sporadically on other characters.