That’s because the denoising was set low. You can tell that it did actually modify her sweatshirt and the background. The model is just not able to turn her sweatshirt into a blazer, and keep her face relatively similar.
To do this kind of editing, you add noise to the image and get the model to remove the noise, painting in new details. To fully change clothes, you would have to add so much noise that you would lose the original image entirely and end up getting a completely different person, background, pose, everything.
We shouldn’t be surprised that race changed. The model didn’t know what race she was in the first place. It was just told to ‘change the image according to these prompts’ with about this |_| much wiggle room.