XenDesktop Full Screen Flash playback can hang the Client Machine.
Interested in hanging your XenDesktop Session out to dry? 😉 Chris Hahn recommends running Full Screen Flash playback with an older Citrix Client.
Of course if you want to avoid frozen sessions while your XenDesktop users are surfing YouTube, make sure you are running the Citrix 11.2.2 client and have the following registry setting set.
More information can be found @ https://support.citrix.com/article/CTX123463