[CentOS] Emacs problem

I am currently running the latest kept yum version of emacs on Centos
6.6. The issues I am having is that sometimes when I type input, some
of the input randomly disappears and will then reappear when I
highlight where the missing input should be.

Why might this annoying thing be happening, and is there a way to fix
it? Also I have not made any edits to emacs preferences so they are
set to the defaults, and never happened in Centos 6.5 but now does in
6.6.