Emberjs: Internet Explorer not showing changes to model unless page is refreshed

I have a problem with Internet Explorer not showing changes unless I hit F5 (refresh).

Scenario:

I have a page with a link that opens a modal window (where I do my editing). This works fine. I can make my changes and click my 'OK' button, which closes my modal window. The calling page does not show the changes unless I hit F5. It works perfectly in Chrome and Firefox.

Using Chrome and Fiddler, I can see that a GET is called right after my PUT (clicking the 'OK' button). In Internet Explorer, I don't see the GET after the PUT.

[This is using Internet Explorer 11]