We are using a Chrome box to display slides from WordPress. Periodically the display will flash white, black, and other colors before returning to the slides. We have rebooted the computer and restarted the display, but the issue still occurs.
We were originally using the Photo Album gadget but the resolution of the images was not correct (1920x1080), which is why we're using the WordPress site with the Web Page widget. Are you asking us to try testing just a single image in WordPress, as in, to make the front page one image?
We tried using Google Chrome to show the page instead and it displays without the random flashing, so we believe there is a bug or an issue with the Rise Vision software communicating the WordPress slideshow.