Remote Desktop user session are disconnected immediately at logoff and don't display any rundown actions to the user. On the server side, the user session is logged off after a few seconds.
This behavior can be controlled with the Instant Logoff feature in Ivanti Workspace Control.
More information about Instant Logoff can be found in the Ivanti Workspace Control Administration Guide. Please see the link below
Note: There are multiple vendors providing similar features which could lead to this behavior. If Instant Logoff is disabled in Ivanti Workspace Control investigate if any of the other Software Products that are installed trigger this behavior.