I suspect this affects more than just Quietus, but haven't observed it elsewhere so far. When you fire Quietus at a single target, especially from fairly close distance, it is common for most or all missiles exploding, even if they don't look like they'r

This bug also seems to strongly affect Frost Shards. It appears that a lot of missiles are hitting, but only some of them. The rest explodes prematurely.

IIRC, there's a CheckMissileSpawn method that will check if projectiles can be spawned correctly, maybe it's causing these problems with projectiles.