Hey I learn something everyday, thank you for pointing that out. Now, I tested and Pinned Calculator and Photos. It work on my system. Somehow Windows system don't work, it might due to Windows system is not the same as other application.
What you can do to resolve your issue for Calculator, Photos and other normal application. Please try purge and reinstall steps as mention here : [Link]. Just make sure to redownload the latest version from your account page. Reboot after the purge. Reinstall and reboot again after the installation. Retest and report back here.
Thank you,
Basj,
Stardock Community Assistant.