#[Reactive] not working?

I have a child component with a property that has the reactive attribute set. The property is initially passed from the parent to the child. To my understanding, the child should trigger an update once the reactive property changes its value. However, from my tests, the child always updates, even without any changes.

I made a Wirebox to demonstrate the problem: https://wirebox.app/b/x58vo

The docs: https://livewire.laravel.com/docs/nesting#reactive-props

Is this a bug?