Chance orbs useless

Had multiple items just vanish when using a chance orb

Try reading the item. That is what the item does. It either upgrades to a unique or deletes the item.

It changes the item to magic (flasks and tinctures) or sometimes to rare if that item can be a rare.

Uniques have a very bad chance to be rolled.
Have used maybe 300-400 chances this league and no unique.

I use chanced orb for changing utility flasks and tinctures from white to magic.
There are many types with a unique so with a lot luck ...

I used chance on other flasks too.
Chanced orbs are/were? cheaper than transmutations and I did not need so many for Kirac than in older leagues.

But probably it is better to use transmutations to make a life/mana flask magic.

For white possible 4L armour items u should use binding orbs to get 4L rares - if it has no good mods already.