We have a XenApp 7.12 environment where we publish Desktop Sessions to users with Igel Thin Clients and Notebooks with Citrix Receiver installed.
Short before releasing this environment into production we encounter a problem with hanging sessions from Internet Explorer 11.
When viewing a video, either Flash or HTML5 and closing the IE window while viewing the video, you can hear the audio continue to run in the background and in the task manager you still see, that the two IE sessions (one for 64 bit and one for 32) are still running and consuming memory (almost no CPU). These task will only be closed during logoff from the session. They can also be closed manually. This is not always happening. Almost every 2nd to 3rd session behaves this way. But when we go into production, this can lead to poor performance according to low memory.
We have not encountered this apart from watching videos, but we cannot be sure, that also in normal browsing some sessions will not be closed.
I've tried several setting in Media Redirection - without success. On a server where no VDA is installed we do not get this kind of problem, so I think it is some kind of Citrix-related problem.
VDA with Windows 2012 R2
Windows 7 Client with Receiver 188.8.131.5210
Searching the net for almost two days, showed no really helpful information.
I hope anybody here can help.