On cancelling inheritance on Parent component, the child component within it also shows broken inheritance. I have the latest AEM Version. Is this an expected behavior?
I've tested on 6.5.12.0 & observed that it's not true. You can try with OOTB components and see if it is same behaviour or not.
I've tried to add column control component and multiple components inside the column control. Cancelling inheritance on column control component didn't break the inheritance on child components.