#68691 fixed the implementation of the Equals(T other) methods for the various vector and vector like types (Vector2/3/4, Vector, Vector64/128/256, Plane, Quaternion, Matrix3x2, and Matrix4x4) to correctly take NaN into account.
It would be beneficial to add additional test covering over non-canonicalized NaNs to ensure other regressions or mis-optimizations don't sneak by in the future.