Not sure why but when I talked to LG Support, it started working again. I did do a reboot or 2 but I don't think anything except time chawed.
Mac OS Catalina seems to be better but I still occasionally have problems if DVDFab has failures like read errors. I just tried to clone a disc, it took a read error. DVDFab properly showed the tax in red as failed but my drive then wouldn't load the disc again until I powered it off. Mostly it's working now.