Ok, there’s a hack.
I found this tutorial on how to disable a plugin if logged : https://besuperfly.com/disabling-plugin-when-user-logged-in/
I just changed on line 20 the is_user_logged_in() & !is_admin() to the exact opposite, that is !is_user_logged_in() and it works so far. (You can also change the name of the function to enable_logged_in_plugin, but this is does not affect anything at all.)
Hope it helps.
I am having the same issue. I am using the plugin with the Divi template, although I have changed the template several times in order to check if the bug has to do to with that. But it doesn’t.
The plugin visibilty seems to behave according to the Discussion settings that is, only logged users are allowed to post comments, but comments remain visible for everyone.
Since, I cannot find a plugin that would add this option to the main Discussion settings, I am stuck with this!
I would appreciate some help on that.