• Intermittently published application launch gets stuck at loading screen.

• The issue was not seen in RDP session.
• Issue was intermittent and hence it was not replicated while testing with Published desktop and RDP initial app.
• Captured a complete memory dump. However, there were no traces of any threads in hung state. But there were two sessions initializing in the dump waiting on credentials.
• CDF logs were collected from the VDA and DDC.

Issue was fixed by disabling below policy:

Computer configuration\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Security\Always prompt for password upon connection
 

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Problem Cause

The issue was due to  group policy  Always prompt for password upon connection being enabled.

Looking into the VDA CDF traces, it was seen below policy was enabled and and getting executed just before virtual channel creation.

Computer configuration\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Security\Always prompt for password upon connection


30835,1,2020/08/21 12:29:29:03920,10468,2216,0,Rpm,1005,RegQueryPromptForPassword,9,Information,"RegQueryPromptForPassword: RDS Prompt for password policy is enabled. Password is required upon connection.",""

30835,1,2020/08/21 
57794,1,2020/08/21 12:29:35:25869,8392,12712,-1,cutildll,SSPIChecks.c,223,MakeComputerChecks,9,Information,"CTXGINA: SSPI: MakeComputerChecks: fPromptForPassword is set",""

58822,2,2020/08/21 12:29:35:34787,2440,2216,0,Rpm,WtsProtocolConnection.cpp,1199,ctx::CWtsProtocolConnection::CreateVirtualChannel,12,EntryExit,"ENTRY --- ctx::CWtsProtocolConnection::CreateVirtualChannel: Session Id 3",""


 

https://support.citrix.com/article/CTX220154