Flavorings formulated for food and beverage and even e-liquids are going to get you flagged for multiple solvents and bring in a long list of chemicals that most “flavored terpenes” are specifically formulated to exclude. If it wasn’t explicitly formulated for cannabis testing compliance, there is no reason a flavor formulation would ever willingly exclude these ingredients.
This is why flavorings formulated by reputable terpene companies can be very good but not quite perfect. It’s not that we don’t know how to formulate the flavor concentrates. Common flavorings are honestly as easy (and cheap) as it gets to formulate because the ingredients are so much more abundantly produced. It’s just not going to produce a safe or compliant end product.