Just bought and downloaded this program and the same thing has happened twice. I am creating a composite of 7 layers. Each layer has been converted to B&W and had level adjustments and some dodging/burning and thats it. After saving the file and coming back to work later, the layers have become corrupted and blocky and lose information creating 'holes'.
Now I created the file once and this happened. So I deleted the project and started again. I got a bit further along and then the same thing happened.
This is not how I wanted my first use of this program to be as I was hoping to use it instead of Lr/ Ps.
Attaching some photos so you can see what I am talking about.
Lenovo Yoga 720, Corei5, Win10 64bit, 8gigs Ram,