Is it a bug when you turn your character into a doll and the item icon change into search icon?
It is a bug, the search icon happens when the item is undefined. Do you have any more details about this?
You can equip that item and nothing its like a icon item only nothing really happens when you equip it but is has a description it might removed or it is just mod that you install but i didn't know how to use mod in certain game like this.