Image blurred on Phone Size

Hello,

I am having a very hard time trying to figure out why when my images are getting blurred when it goes to a small viewport size. All of the images are the exact same, (I made one group and copied the rest) but for some reason all of the ones I copied are blurred except the original one. I’ve tried to make a new picture in photoshop and upload it but it is still blurred. Pictures are below.