After using a Private Window, and then Quitting and Restarting Brave, I get the Mac Beachball for a bit and then Brave crashes. This continues with each attempt to restart the program. Eventually I have to reboot my computer, restart Brave and immediately stop Brave from opening the previous web pages that were open at the time of the crash.
I just wanted to make Brave techs aware of this as an FYI. I now know to reboot to get out of this cycle and go on my merry way.