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Black background appears out of place when dragging window

Yoko Katagiri


I am using Xenapp 7.15LTSR CU4 from Chromebook.
When I drag a published application, a black background appears off the window of the application
The window closes when you log off at the connection center.
but, the icon remains on the taskbar.
 (see attachment)

Do you have an idea to correct this problem?


●VDA Serever Information

 OS: Windows 2016
 XenApp: 7.15 LTSR CU 4
 CPU: 8
 Memory: 16 Gb


●Chromebook information
 ASUS Chromebook Flip C302C
 Citrix Workspace app for Chrome
 Chrome OS Version 75.0.3770.129(64bit)


The problem does not reproduce in the windows client.

Thank you in advance for your help.




Screenshot 2019-08-02 at 16.33.45.png

Screenshot 2019-08-02 at 16.34.02.png

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Please try creating these registry keys on VDA:


HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Citrix\wfshell\TWI   "SeamlessFlags"=dword:00000400

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Citrix\wfshell\TWI  "WorkerWaitInterval"=dword:00000005

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Citrix\wfshell\TWI   "WorkerFullCheckInterval"=dword:00000032


Hope this resolves your issue.



Shalini Pradhan



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