I’m experimenting some problems with restrict content for non-logged in users: I tried 2 different plugins (“members” & “restrict content”) to handle visibility but in both cases, after login and click on the restricted post, the user seems to be logged out from site (with consequently non-visibility of the selected content).
Unfortunately, we cannot help you with this because it’s a third party plugin issue. And we haven’t tested our theme with such a plugin yet. It is beyond our limitations and supports policy.
You can try contacting the plugin support for this.