See: https://knpuniversity.com/screencast/symfony2-ep1/bundles#comment-1209441887

Basically, there is a report that some code that shouldn't hurt anything, does. Thomas had a good comment that it could just be template cache, which makes sense based on the reports. But why? Why would the template cache need to be reset here? Is it related to some renaming we're doing that's confusing things? Something else?