I seem to have hit upon an interesting edge case, causing LibreOffice to freeze on the Mac. This happens in combination with a free/open-source tiling window manager plug-in for the Mac, called Amethyst.
When an automated window tiling takes place from Amethyst, my LibreOffice window often freezes into the spinning rainbow beachball, and cannot be recovered. Even after quitting Amethyst, the LibreOffice window remains frozen and has to be force-quit. The freezes do not happen if Amethyst is disabled while I am using LibreOffice.
Since both of these are open-source programs, hopefully fixing this problem won’t be too difficult to figure out in terms of finding the conflict. (Though I’ll admit, I’m not a programmer and not an expert at this stuff.)
Thank you for your time.
*** This bug has been marked as a duplicate of bug 148435 ***
Sadly a known issue. Set to dupe of existing bug.