I made a simple test model and got false, so I think this is related to the specific structure of your model somehow breaking the code’s logic. Could you upload an example model that returns true so we can investigate what is going on?
Edit: in my test, I got false because there is only one instance found so instances is nil, which fails the respond_to?(:bounds) call. That’s what I would expect when the instance is nested in another component’s definition’s entities collection. There is only one instance regardless of how many times the parent is placed in the model.
So, I can’t explain why your test returned true without seeing the model.