Every time I scroll up or down, my picture disappears
 

I am working in an existing worksheet where I have inserted pictures. When I
go into my worksheet now, all of my pictures are not showing up. They are
not necessarily gone, but you have to right click on them and drag them off
to the side to see them again. However, if you scroll up or down, the
pictures disappear again.

I have never had this problem before in my worksheets. What can I do to
make my pictures stay?

Thanks!