As of 1.21 (PS4) I'm getting weird graphical flashes when firing an Epic version of the DR12 Quasar tech revolver that fires 2 rounds at once + electrical damage.
This is really weird because I can just open my inventory and craft another DR12 and the graphical glitches don't occur. It's just on this one particular weapon and only when I'm aiming down sights to use its charge shot.
I loaded up saves from my other playthroughs where I also have the same DR12 that fire 2 rounds (obtained from the Gig
Severance Package), no graphical glitches at all.
Not sure if it's worth reporting as it's super specific and if I was to disassemble the weapon the whole bug might cease to exist.
edit: it seems the bloom/flashing effect is only guaranteed to happen when the (specific) Quasar's rounds hit certain kinds of scenery like the blue barrels in the video.
It reminds me of an odd flash effect I'd sometimes encounter in dark tunnels/areas (skip to 0:45)