The Sphere Bewitching Hour seems to increase DMG from auto attacks when weapon has Elemental dmg, OR using the Elemental dmg from Storm Gloves.
https://www.youtube.com/watch?v=7ZhQTxlUfj8
Thank you for submitting this bug. We have added it to our bug tracker
Fixed with the Trials Update as Sphere's system was replaced.
Thank you for submitting this bug. We have added it to our bug tracker