The vendor has published 2 unique mention(s) for this bug: 1. After upgrading to VDA 2402, the first ICA session after a reboot may show a grey screen, which resolves by disconnecting and reconnecting or launching an application session first. 2. After upgrading to VDA 2402, the first ICA® session after a reboot may show a grey screen, which resolves by disconnecting and reconnecting or launching an application session first. Latest urls for this bug: 1. https://docs.citrix.com//en-us/citrix-virtual-apps-desktops/2203-ltsr/whats-new/cumulative-update-7/fixed-issues 2. https://docs.citrix.com//en-us/citrix-virtual-apps-desktops/2402-ltsr/whats-new/cumulative-update-2/fixed-issues