The recent apps in the start menu are not displayed by the Citrix Receiver. Only the recent apps from a local app or shortcuts from GPO’s are shown. The registry key values are saved but are not displayed. If the users have icons in the start menu from a second worker group, the keys are created in the uninstall Hive and the recent apps are displays correctly.
By default, Receiver creates two registry entries in HKLM\Software\Wow6432Node\Microsoft\Windows\Current\Run.
You may add SelfService.exe as third entry and remove it from HKCU if it is there:
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunMissing Registry key under HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run