I won a WS from Ravana today, but it disappeared! I don't see it in my inventory or storage, what happened
If I'm not mistaken, if you're using Legendary Spirit to scroll, with the "use White Scroll" box checked, it will not ask you a second time to confirm if you want to use the White Scroll. (I don't have anything to scroll right now so I can't test it right now, but it should work that way if I remembered correctly...)
I believe @NebCJ is correct with Legendary Spirit skill, it will check it off and automatically apply the box on the bottom. Is this what you used to scroll?
Game have reminders saying to store white scrolls in bank while not being used. I always put them immediately to bank before doing anything else to prevent any mishap. Rip your white scroll. T.T