Weird behaviour in fusion tab.

I have a game-breaking error/thing going on in one of my compositions. I first noticed it when I restarted DaVinci and reopened it again. It had messed up a few of my still images. Placed them outside the view, and also messed up the aspect ratio. I quickly tried to fix it, but then ran into another problem. I think it will be easier to watch a video for this one, so have a look.

www youtube com/watch?v=ERcDfcks3bw&feature=youtu.be

I don't know if I've accidentally clicked something in some setting somewhere, or if it is a bug. But at least I'll ask here first.