Fullscreen not working in IE11 for embedded report when using the Javascript API

Hello,

I'm attemtpting to set an embedded report to be in fullscreen mode using the following code:

var report = powerbi.get(this.reportContainer);
report.fullscreen();

This works as expected in Chrome, Firefox and Edge but in IE11 it fails to do anything.

I need to support IE11 so does anyone have any ideas on how I can get this working?

Thanks.