I want to show you a cool magic trick with this buggy software. Try to crop this image using the crop tool only in CorelDraw without any modifications and whatnot. You can't can you?
NICE.
https://www.dropbox.com/s/r2jxa8lwdd5rio1/cantcropwontcropcrap.cdr?dl=0
The non-destructive effect (Gamma) is the culprit.Removing the effect (which of course will change the appearance) or flattening as John says, or converting the image as Gordon says, will make cropping possible.