Hello,
Sorry to hear you are having issues. Please try, uninstall Start11 V1.2, reboot. Reinstall V.1.21 Beta, reboot and retest. Link for the beta should be available in your product page or from this thread. https://forums.stardock.com/511466. If the issue still happen with the latest beta, report it in that Beta feedback link.
Thanks
Basj,
Stardock Community Assistant.