After selecting the image and hitting CMD+SHIFT+F you need to select another note and go back to the distored note to see the effect of it. This has been my lifesaver solution so far, as I am facing this problem for the last year at least. Latest Evernote on iOS 8.3.356604 and MacOS 6.11.1 (455061 App Store). I wonder why this cannot be fixed, as it seems pretty obvious to reproduce it. Happens on any photo that comes from iOS - be it scanned document, photo taken in the app itself or even photos that were not taken in the App.