The vendor has published 2 unique mention(s) for this bug: 1. The VDA CU upgrade agent becomes unresponsive during the upgrade window. As a result, not all VDAs show "upgrade available," and some fail to install within the scheduled window. 2. CitrixUpgradeAgent service is not able to start in non English OS locale. Latest urls for this bug: 1. https://docs.citrix.com/us/en/citrix-virtual-apps-desktops/2402-ltsr/whats-new/cumulative-update-3/fixed-issues.html 2. https://docs.citrix.com/us/en/citrix-virtual-apps-desktops/2507-ltsr/whats-new/2507-ltsr-initial-release/fixed-issues.html