For about a year, maybe two, LibreOffice has been hanging (turning off) after a short period of time. Always and no matter what. Resetting to factory defaults does nothing. Profile reset too. Reinstalling Windows doesn’t help either. The app has become useless and is just making me nervous. What is it about? I have already performed all possible recommended actions, to no change.
Assuming you have LibreOffice 7.x
From the Start Menu start LibreOffice from the entry LibreOffice (Safe Mode). You will see the below screen, select Configure > Disable hardware acceleration… and click Apply Changes and Restart.
The setting above applies for only this start, so when LibreOffice has loaded, from its menu, click Tools > Options > LibreOffice > View > Force Skia software rendering and click OK. Restart LibreOffice.
If it is stable, good, otherwise try unticking Use Skia for all rendering.