Observable type variables

I have a component () which takes a prop :courseInfo. Inside there i have a v-for that loops over the courseInfo Array. In every element there is a onClick=myFun(item)
This component gets called from two different components (CompoA && CompoB)
When i do console.log(item) inside my myFun() i get

CompoA -> { var1: value1, var2: value2…}
CompoB - > {ob: Observer}

The result is that in the CompoA i dont have the Reactivity that i expect from like i have it in the CompoB.

Can please someone tell me why this happens…?
Thanks