I’m guessing you’ve done some more work to it because that’s not what’s happening now. It’s just including -left: 100px.
I tried what I described last week by tweaking your codepen at the time and it works. You just needed to change the keyframes of moveContentRight so they’re the reverse of moveAndScale. The trick is the starting position of the second animation is the same as the end position of the first one so it won’t jump around.