The vendor has published 2 unique mention(s) for this bug: 1. After a reconnection attempt was interrupted, for example, by closing the logon window, sessions that used smart card authentication could not be recovered. Subsequent reconnection attempts displayed a gray screen. The session could only be released by manually terminating VDA processes. 2. When you reconnect to a disconnected Linux VDA session that uses smart card authentication, and the LogonUI window closes or the ICA connection drops, the session becomes unrecoverable and displays a gray screen on subsequent reconnection attempts. Latest urls for this bug: 1. https://docs.citrix.com/us/en/linux-virtual-delivery-agent/2507-ltsr/whats-new/cumulative-update-2/fixed-issues.html 2. https://docs.citrix.com/us/en/linux-virtual-delivery-agent/2607-ltsr/whats-new/fixed-issues.html