Using CTRL+ALT+DEL results in the ALT key remaining activated. Following inputs will either open menus or add "Alt" in front of the pressed letter/key.
Issue has been fixed in CWA 2203 CU6.
Please download updated version here - https://www.citrix.com/downloads/workspace-app/workspace-app-for-windows-long-term-service-release/workspace-app-for-windows-LTSR-Latest.html
Known issue in CWA 2203 CU5