@Axel329498686duh sorry about that, I don't think I asked the question correctly. Can you a screenshot of the area in which you selected to remove/change the background?
Here is an example:
I used the image you shared to replace the background and didn't see any issues with her eyes.
@Axel329498686duh , that is interesting... unless you selected her eyes, it should not be regenerating her eyes. Can you share a screenshot of the area you selected in Gernatative Fill?