Sorting in Drop Down List didn't work (Internet Explorer 11)

Hi Community,

we use the SAP CRM WebUI. We have a Drop-Down-List with different Content. The Content is sorted.

Since a few days we rolled out IE11. Now the sorting didn't work anymore.

If I open the WebUI in Firefox 26 it works fine.

I've searched for SAP Notes but I didn't finde some.

Has anyone an idea?

Thanks for any reply.

Benjamin