If you use the sharpen tool after cropping the image, preview is not aligned with original image. This may be due to bug 335661. Reproducible: Always Steps to Reproduce: 1. Open an image in editor 2. Crop it 3. Open sharpen tool 4. Play with preview modes. Effects may be more annoying according to preview mode.
Created attachment 89538 [details] Exemple with "Horizontal split preview"
yes, it's a dupplicates of bug 335661 Gilles caulier *** This bug has been marked as a duplicate of bug 335661 ***
Fixed with #335661