ehm, I used the shockwaver in the third level, got the legendary multishot upgrade.
this should give you a full circle going outward, right?
but in mky case, the lower right part of the circle wasmissing, I assume that the number of projectiles was too large,so sum entity limit was hit and the projectiles in the lower right jsut wouldnt spawn.
i still won since eahc hit cause combustion and did 228 hit damage on top.
but that was a miracle run anyways :-)