Hyperion Planning 11.1.2.4 - Drop down list issue

Hi all,

We have installed Hyperion Planning 11.1.2.4.007.05, everything works properly but we have an issue with drop down lists using the planning applications on Internet Explorer 11.

Basically for all the drop down lists in the several planning menus (like create new member, select plan type in the business rules menu etc.) the first time we click the drop down list it appears and disappears instantly, the second time works properly.

In the Copy Data menu instead it doesn't even work the second time we click, basically when we try to select a Static Dimension in the Copy data the drop down list appear and disappear without letting us select the dimension.