Frames bleed together when rendering a movie

I’m using Unreal Engine to render images of cars for use in training a neural network so I’m using a legacy Matinee Actor to capture a sequence of frames. I’m spending only 0.2 seconds in a level to capture a small number of images of a car before reloading the level and generating a new scene. This works, but I’ve found that I frequently have the previous scene bleed into the first few frames of a new scene. I thought it might be caused by auto exposure, but turning that off did not fix the problem.

Maybe the video card is taking short cuts in rendering a completely new scene? I’m capturing frame by frame so I had hoped visual artifacts would not be present.

Any help fixing this would be great!

PS: Here are some images that show what’s happening.