There doesn't seem to be a pattern or a particular type of file I am working on, but I've been having this issue lately. I will be working on a file, and just suddenly Coreldraw is gone! It just shuts down. Doesn't give an error message or anything. When I start the program up again, it will say it found a backup file (or more than 1) do I want to open it? and of course, unless I've recently saved it, I will have lost most of my work. I just don't know why it is shutting down. Any insight??
We get this quite frequently too. Corel just vanishes in an instant. No error message, no freeze. Just one minute Corel is there working, the next it's not. We have as yet been unable to spot any pattern to when and why it happens.
If you look at the the thread: Coreldraw Minimising into Background Apps - Causing Problems Opening Files
you'll see that there's a problem with CGS2018. If itis minified with no files open, it makes Win10 very unstable.
Is this your issue?