Rebuilding Cache within SF, strips out most category and its posts from frontend

Hi

I have come across an issue related to “Rebuild Cache” SF functionality.

Initially all category and posts within respective category where showing in the front end via ajax filtering ( i.e. on click of one of category <select> field, its respective posts where filtered in another <select> field. )

But as soon as I Rebuild Cache, most of category and posts which used to show before, is not showing now.