The attribute modifier is not working as intendit.

What I expected to happen was...:
I keep the scale[attribute] from the item that i still have in my hand

What actually happened was...:
The item only works again if i re-equip it.

Steps to Reproduce:
1. give any item with a attribute modifier like /give @p minecraft:stick[attribute_modifiers=[{type:'generic.scale',uuid:[1,2,3,4],name:"",amount:1.0,operation:'add_multiplied_base'}}]
2. put it in the offhand slot
3. and put it directly in the mainhand slot