Flicker to wrong frame after video section ends

When viewing a video section there's a split second where the view flickers the start of the video (or at least, does some sort of flicker to some other image) before moving to the next step. This is somewhat distracting.

You can see it here happen several times here:

https://app.supademo.com/demo/cm0r1w2c90deuk62wptkz1wyt

I'm using a Windows 10 laptop with Chrome, just in case you don't see it on your machine.