Not Bug White scroll disappear

When I use the dark scroll for equip, then I failed and my equip was disappeared, the white scroll also disappeared, these two days I encounter two times.

 

White scrolls do not prevent the item from booming. Every time you use them while scrolling, you lose the white scroll. (regardless of success, failure or boom)

 

I don't used the white scroll for equipment, it was stored in my bag...

 

if it was stored, there was a prompt saying if you wish to use the white scroll, you probably clicked yes and.. yeah.
it vanished.

 

I used the skill "Legendary Spirit" to upgrade, then I very serious confirm that was without any dialogue window to ask me for sure or cancel

 

There's a checkbox for white scroll on that skill. Open that skill and you'll see it.

 

Oh no

 

If you want to fell better i once used a ws dummy scrolling a random iten.