Steps to recreate:
1) Install JSN on Joomla and configure the Social connect settings for the different social media platforms. Leave the default settings.
2) Go to the frontend and under the registration form there are the social medial login buttons (or any other pages where the social connection everywhere buttons have been inserted {socialconnect})
3) Go to the jsn social connection plugin and restrict the JS to different pages
4) Back in the frontend the social connect buttons on come out on the pages as configured in the menu
5) Go to the jsn social connection plugin and remove the restrictions. It is impossible to reset the setting so that the JS and the social connect buttons are visible on all pages