Consider the following scenario:
You install an application on a Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2-based computer.
You pin the application to taskbar.
You update the application.
In the scenario, when you right-click the application on the taskbar, the icon becomes blank in the Jump List.
To resolve this issue, install update rollup 2975719. For more information about how to obtain this update rollup package, click the following article number to view the article in the Microsoft Knowledge Base:
2975719 August 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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