Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - Bugs & Technical Problems Giant Flame Rune + Any Frame

Has anyone else noticed that when you combine a Flame Rune that has higher damage than 9% on it with a Rune Frame (Mystic or Power Frame) it goes from say a 15% Fire Damage Rune back down to a 9% Fire Damage Rune?

Is this working as intended? On the Divinity Wiki, it shows differently, and when I do this with a Physical Damage Rune, it retains its original damage value, unlike this Fire one here.