Hi! So we're making cp soap, have a little bowl of essential oils ready to put in at trace, and when we pour it in it immediately turns a black or dark brown color. Just sitting there on top before mixing in, it's turned from normal yellow essential oil color to this dark color. This was last night, haven't unmolded yet and the soap color is its normal cream color if slightly darker. Wish I had gotten a picture before mixing it in! Does anyone know why this happened?