I don't know if this is Zorin's responsibility, but LibreOffice sometimes suffers Spontaneous Crashes (They are not very regular but when it happens it is so bruh) It happens to me in both Lite and Core, I don't know if it happens to more people
Are You using the Flatpak Version or the preinstalled Version? And what do You do when it crashes? Do You get any Error Messages?
I always use the Pre-installed one, because in all the years I have had Zorin it has always been perfect
When it crashes, it does not show any error message or code, only the document recovery window appears.
Is Your System run with Wayland or X11? You can check that in Settings>About and there look for the Line ''Window Manager''.
Use X11
Okay, when it crashes again, you could take a Look in the Logs to check what they say. Maybe they offer something.
Or You could try to reinstall LibreOffice. Another Idea would be to use the Flatpak Version of LibreOffice to check if the Crashes there happen, too.