Flashing

I am on Zoom Version 6.4.6-64630.  I check regularly for updates.  I was on a zoom call today and experienced intense flashing and the screen went dark.  It was okay after a few minutes. But, the whole experience was a bit unnerving.  Are there any suggestions? I was told to uncheck options for hardware acceleration.  Soon, I will be on a Zoom call for a court hearing and want to make sure everything is okay.  Thank you