The vendor has published 2 unique mention(s) for this bug: 1. The VDA might become unresponsive due to the Winlogon process crash by TWI3.dll. 2. You might experience a sign-in screen crash that might make your desktop unresponsive. Latest urls for this bug: 1. https://docs.citrix.com//en-us/citrix-virtual-apps-desktops/2402-ltsr/whats-new/cumulative-update-4/fixed-issues 2. https://docs.citrix.com//en-us/citrix-virtual-apps-desktops/2507-ltsr/whats-new/cumulative-update-1/fixed-issues