Of course! That’s why I tried updating my drivers, unfortunately to no effect. So it very well may still be solely a driver bug that hasn’t been addressed. I’m hoping that if someone else has had a similar issue then some parallels might be able to be drawn.
I will note some extra info here: This only happens for me with the fps template. I’m thinking it might have something to do with the projectile blueprint and its underlying components - perhaps the projectile component. We don’t use those sort of projectiles anywhere else (using ray traces instead) and so I can fire custom weapons all day with no issue.
I’ll try to set up a custom projectile and see if I can narrow down which component might be the root that triggers the crash (or triggers the driver bug which causes the crash)