Cast to Device is blocked in Opus now, as it doesn't work properly outside of Explorer. The way the menu is built is non-standard and makes assumptions about the program displaying the menu and how the menu is displayed.
You may be able to un-block it by adding {7AD84985-87B4-4a16-BE58-8B72A5B390F7} to Preferences / Miscellaneous / Advanced [Troubleshooting]: allow_context_menus, but do so at your own risk.