Post titles and sidebar menu links not visible.

Hello, I am having some trouble with my GP site.

This morning, I noticed some of my post titles on the home page were present and then while working with the site they were all gone.

Some of my recent posts on the right sidebar and page navigation on the bottom menu bar are invisible until i drag the mouse over them.

After clearing my browser history the links come back but the post titles do not. After working with the site a little more, they go away again. This happens both with mobile and with my laptop.

Is there a setting that I am missing?

Thanks