Niagara FX crashing often: Q is normalized

Getting this on crash a lot with various FX from different packs and sources. Does anyone have any insight?! Thanks in advance.

Assertion failed: Q.IsNormalized() [File:D:\Build++UE4\Sync\Engine\Source\Runtime\Core\Public\Math/QuatRotationTranslationMatrix.h] [Line: 59]

9 days later, still getting this. does anyone have any insight? thanks!

Bump! Still getting this. Anyone have any thoughts?