Could be related to: https://bugs.launchpad.net/pantheon-photos/+bug/1354631. Could you try resizing the photos window and moving it away from the dock and then using the crop button?
Could be related to: https:/ /bugs.launchpad .net/pantheon- photos/ +bug/1354631. Could you try resizing the photos window and moving it away from the dock and then using the crop button?