Photoshop files Compress when saved to cloud

I have just tried to edit an image, I had saved to cloud, only to find that the quality of the image has dropped so much I might as well delete the image. This seems to be the case with all my images that have saved to cloud, as opposed to being saved on the desktop, every image is of such low quality they are unusable...

Does Adobe compress images that get saved to cloud via Photoshop CC or is this some sort of bug?