I have the following modules enabled in a Drupal 7.24 installation:
FlexSlider Views Slideshow 7.x-2.x-dev
Views Slideshow 7.x-3.1
I've created several views using the flexslider plugin. I am using thumbnail navigation. On the first first visit to the page created in views, the first slide partially loads the initial image. (see the attached image flexslider-partial-load.jpg).
After clicking a thumbnail or resizing the browser window the full image will then load. (see attached image flexslider-full-load.jpg).
You can see a live example at here.