Issues – Blur Image Background - Editor Review

I notice when I click on (Blur) the whole image itself becomes slightly blur. I find that very annoying because that means I'll have to (erase) the parts of the images that I don't need to blur. Is there any way or form that you guys can fix this issue? I love the app and think it's amazing however when it comes into the situation of blurring the whole pictures, truly bothers me to the max because I always have to erase the parts I don't need to blur.
Review by Hmong roll on Blur Image Background - Editor.