Could you please let us know when the app crashes exactly? Do you get any error messages? If possible, can you share the screen recording of the issue?
Happens when I'm working with layers. One of the things I use Express for is to place tattoos on a model. I'll erase the background of the tattoo image (there's no background but I have to do that in order to erase parts of it) Once I zoom in to the image to edit or restore it crashes. Sometimes the app goes blank and all I see is the layers I added on my image. But the image is gone. There's no warning or alerts. when I restart the app it picks up right before I started the work on that image. Previous work, fortunately, has been saved. I can't record it because it's not something that I can predict will happen. Just happens more often lately.