Photo Studio's Camera Shots have White Thumbnails

In the Photo Studio template project, white camera tracks are showing as the shot previews instead of the realistic looking icon-strip.

This was reported and tested in 4.24 Preview 4 (CL-10387632) and reproduces in 4.25 (CL-10574187)

1. Open the UE4 Editor and create a Photo Studio project
2. Open the Sequence "LS_CameraMotion" and look at the shot thumbnails

Results: The Camera preview or Shots Track is white as if the scene used for the cam thumbnails strip is way over exposed
Cameras itself / Post Process volume have proper exposure Sequence renders right in game and as rendered to a movie.

Expected: Should show icons in normal brightness as seen through the cameras