Auto Remove Pages

Hello! I designed a Buddypress website and this is private website only Log in users can access the main feature of website, but few pages are public for visitors. I am facing problem when I makes pages public using subway but after few days pages becomes private automatically and remove from Subway list. Suppose I want to keep my about us, contact us , faq pages public but after few days pages become private automatically and user must log in to view these pages as well. would you please tell me why this happens.

my website is https://www.buraqq.com and at footer section thare are pages that are public,but these are not opening

Regards