A couple of days ago I was involved in a case where ICA sessions were suddenly disconnected and the users were unable to reconnect. The setup was a simple ICA-proxy access gateway using the latest build (126) and there were no error messages on the Storefront server.
After involving Citrix support they recommended that we disable AppFlow for the access gateway (since this deployment used Netscaler Insight to monitor ICA sessions) then suddenly things started to work again.
Now I knew that I’ve seen this issue before somewhere on twitter, a quick tweet discovered that someone else has seen the issue as well.
So apparently using Appflow with session reliability is a NO-GO!
If someone has managed to test this with 10.5 please give me some feedback if this has been fixed!