[7.0.1426] Custom changes not persistent

A while back I chose to have an application always run virtualized. I have since changed my mind and have gone into the Sandbox Expert Settings numerous times and deleted the application from the list of “These applications will always run virtualized”. But within a short time the application has automatically been added back onto the list. The changes are not persistent.

Through trial and error it doesn’t seem to be caused by a reboot or happen after any specific amount of time.

What can I do to fix this? Or is this already a known bug?