SelfServicePlugin.exe invokes SelfService.exe with the parameter "-periodicpoll" (4.4) or "-poll" (4.3.100 or earlier), every an hour.
At this time, the window created by SelfService.exe sometimes steals focus from other windows. This sometimes confuses Z-order of windows.

Note: This issue is independent of whether any sessions are active on client. It may be invisible on the most of the environment, but Window History shows symptom.

The fix is included in Receiver for Windows 4.4.1000. When a user logs on to StoreFront via Self Service Plug-in, the SelfService.exe process may intermittently take focus from the other active windows every hour. [#LC4628]

---

Problem Cause

SelfServicePlugin.exe invokes SelfService.exe with the parameter "-periodicpoll" (4.4) or "-poll" (4.3.100 or earlier), every an hour.
At this time, the window created by SelfService.exe sometimes steals focus from other windows. This sometimes confuses Z-order of windows.

Citrix Receiver for Windows 4.4 Fixed Issues