Disappearing Text

Text keeps disappearing from sites I have accessed???? EX: I’m in “My Questions”, in Tech Rep, I click on one of my questions to look at the responses, when done I close it. Then when I’m back at the page where my questions are displayed, the text is now missing for that question. If I put my curson over the area where the question should be and click and hold down then you can see the questions. Also happens on search engines, other websites, and on Tech Rep. Help pls. mh