RSKImageCropModeSquare does not return perfectly square UIImages for some images

[andrew804]

Using RSKImageCropModeSquare does not always return a perfect square for every image I crop. For example cropping this image at minimum zoom produces an image of 418 x 417

And this image comes out at 405 x 404

However cropping this image produces an image of 437 x 437

It is important for me that a perfect square is returned.

avoidEmptySpaceAroundImage is set in both cases.

Any help would be great.

Thanks