I get the following error when I have an image that is not found (404) and I'm also importing `intersection-observer' ```js import 'intersection-observer'; \\ the package is just imported, no other code references it ``` Has anyone else seen this problem?? <img width="1179" alt="screenshot 2018-10-10 17 04 38" src="https://user-images.githubusercontent.com/246180/46729172-c9fd5a00-ccae-11e8-9ae7-d196bcfe8428.png">