I'm not saying that they've internalized adult-like notions of race. However, it's absurd to claim that race preferences are innate if your evidence is from 1-year olds. Most people are surrounded by their family when they're young, and chances are their family is the same race as them. If you're then presented with someone of a different race, they're visually novel to you and then preference might emerge that way (in a, "hey that person doesn't look like the people I'm used to" kind of way). That's one possible explanation, and there are literally thousands of other explanations. The point is that you have no way of knowing if race preferences are innate when you look at babies who already have plenty of world experience. If you want to claim that race preferences are innate, you would need to look for them extremely close to birth. Ideally at the moment of birth, but same day would be fine. People do studies on babies the same day they're born so it's not impossible.

The point is, you're not making a valid inference from the data.