I am unable to duplicate this with a fresh install of WordPress, PSC, and Roots.
I suspect that there may be another plugin that circumventing or interrupting PSC's permission check (this should be fairly rare as PSC's critical hooks demand top precedence).
The first thing I would try is disabling ALL of your plugins (including PSC), then re-enable ONLY PSC. Then, check if the problem still exists with only PSC enabled. Next...
IF PROBLEM IS GONE: If everything is working at that point, re-enable only one plugin at a time, checking each time for the problem. This way, you will catch the offending plugin as soon as you enable it.
IF PROBLEM PERSISTS: If you still have problems after trying this, disable PSC, change your theme, and then re-enable PSC with a different theme (this will help you rule out whether something in the theme is conflicting). Failing that, you may need to reinstall WordPress as there's probably something more serious wrong.