Extra virgin coconut oil has a relatively low smoking point of 350 degrees F. (livingthenourishedlife.com)
I know butter and coconut oil both have low smoke points so I believe that is my issue. (foodiewithfamily.com)
The added vegan buttery flavor does not lower the smoke point, so it's safe to use up to 365 °F, but the buttery flavor may be diminished. (kitchen.nutiva.com)