I have a custom content type that I use in a custom list, which I have saved off to the List Templates Gallery. When I create lists from this template in different sites in a collection, the Content Search Web Part finds the various records and rolls them up for rendering via a custom Display Template.
This is all great. However, I was hoping that if I added my custom content type to an existing list, the Content Search WP would also find these records, however, such is not the case.
I am wondering if I am doing something wrong or if the Content Search WP is only going to find content where the identified content type is the sole type for the list.