Hi,
Sometimes when I'm working in affinity photo the software deletes the pixels by itself in a very weird way. It removes them in a square pattern and I have no idea what's going on. I'm unsure about how to reproduce it though since it happens rather rare. This time it was when I was using the Erase Brush tool. When I undo, the image is restored bit by bit with squares but never fully, only in the area where I have painted, so somehow it has been deleted back into the history. I didn't do anything special, just duplicate a layer, paint on it and erase.
When I save the document the layer is not restored and if I export it, it shows up as it looks like in affinity photo.
I've attached a couple of screenshots to show what happens when I undo and uploaded the original document as well.
I'm using AP 1.9.3 on MacOS Mojave using a MacBook Pro (Retina, 15-inch, Mid 2015),
2,2 GHz Intel Core i7,
16 GB 1600 MHz DDR3,
Intel Iris Pro 1536 MB
Antonia Avellanos variations.afphoto