flexslider_views only working with Devel module enabled

Just upgraded from Flexslider v1 to v2. The Flexslider Views Style is only functioning when the Devel module is also enabled. I only mention this because Devel us usually on enabled in Development environments and not typical in production.

This can be mitigated by using flexslider_views_slideshow and using the Views Slideshow Style -> Flexslider (Slideshow Type)