Symptoms
Assume that you have a computer that is running Windows 8.1 or Windows Server 2012 R2. When you click an extensible application markup language (XAML) button to open a flyout on the computer, the flyout takes a long time to show the text.This issue occurs when the flyout contains many lines of text.
Resolution
To resolve this issue, install update 2919355. For more information about how to obtain update 2919355, click the following article number to view the article in the Microsoft Knowledge Base:
2919355 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 Update April, 2014
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More Information
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
