Why does sequencer cause stutter / black flash on screen when looping?

I am using the sequencer to do a simple animation of a cube rotating. I would like the animation to loop infinitely. Everything works perfectly except that whenever the animation loops there is a short stutter and the screen flashes black.

Does anyone now why looping a sequence would cause this stutter and screen flash?

  1. The sequence animating the rotating cube.

  1. The Player Controller blueprint where the sequence is triggered from Event Begin Play.