Problems by refreshing with IExplorer

By using the “Refresh” button of the Internet Explorer it doesn′t shows the whole content of the page. It seems as it would stop loading and the scrollbar doesn′t getting smaller and smaller, as it should do, but the content is cut of, so that several lines are missing.
It doesn’t happens all the time. Sometimes I’m refreshing the page by the button several times and everything is all right – BUT suddenly after a new refresh the half of the page disappears again.
It seems that this problem never happens if I’m using the F5 button.
Has anybody a solution?