Generative fill resolution

Hello !

I use the Beta version of photoshop.

I am currently working with high definition images. I use generative fill to extend the borders of my images to put them in panoramic format. The results are amazing but you can still see the background that has been added because it is more blurred and does not have the same quality as the rest of the image. Do you have any tips for improving the rendering generated by generative fill ?