WPX9 crashes

A provisional result
Now, I am sorry to say that, but WPX9 reacts unforeseeably to screen-saver or sleep mode (hibernation not used/not tested).  Sometimes, WP recovers without issues, sometimes it crashes.  I cannot figure out, which are the conditions for this unpredictable behaviour.  Crashes happen with saved and yet unsaved .wpd documents, with converted .doc(x) documents and other file types; there might be only one document or more documents open.  The size doesn’t seem to play a role.  At least no crashes with a blank screen only.
I don’t think that it is a Win 10 issue, because Windows itself doesn’t crash after unlocking.  Other programs recover as expected from screen-saver or sleep mode. Changing the settings for screen timeout doesn’t really help.  As far as I can say, the problem occurred after upgrading to Win 10.  I can’t remember to have had such issues with WPX9 and Win 7 (on the same machine).  I’m just surprised that this issue seems to be known for years, but hasn’t been solved by Corel, although this annoying behaviour and instability of at least WPX7 till X9 must get on the nerves of many WP users.
The only workaround seems to save a document as often as possible and before the screen-saver gets active.

Yes, of course, it does meet the system requirements in full.

Many thanks again.

After upgrading to Win 10 version 1903 from 1809, I tried running WPX9 in Win 7 or Win 8 compatibility mode. Seemingly without success. Crashes happened unpredictably, with saved and un-saved documents – no difference to previous settings. No file corruption in WP template or relevant WP files.
So, the only solution appears to be saving a file as early and as often possible to avoid data/document loss.