Ever since cameras were invented, they have always worked a lot worse on people with darker skin tones. They haven't accounted for different lighting differences. The cameras have always been developed primarily on people with lighter skin tones. A lot of times in different lighting conditions, it just will not work as well on people with different skin tones. People's faces may blend into the background more, depending on what they look like.
On April 4th, 2022. See this statement in context.