This was an intended change, and there’s currently no setting to disable it. I’ll share this feedback internally, but for now you can add some CSS to a theme component that will hide it from subcategories.
If your parent category is /c/events for example, you could do…
body[class*="category-events-"],
body.category-events[class*="tag-"] {
#category-events-calendar {
display: none;
}
}
This will hide the category from subcategories and tags within the parent category.
Replace events with the slug of your parent category.