Hi there,
I checked the front end of your website and could not find a reason why this should happen on your installation.I suggest that you update the theme to version 5.2.4 as you use Cornerstone version 2.1.6 which is not compatible with the current version of the theme.
But I am not sure that will be the reason. Another thing you can check is to change the theme of the website from X to the default WordPress theme and see if the same thing is happening, if yes then this is something related to the settings you have on your WordPress installation and not related to our theme, but if no then we will need to investigate more.
Kindly get back to us with the result of the tests and if needed URL/User/Pass of your website using the Secure Note functionality of the post to follow up the case.
Thank you.