Camera flickering

I am still running 6.4.6, but I'm having a similar problem. I'm using an external camera feed, but I have a multiview monitor that shows it's not the signal from the camera -- that image is rock solid. Only the image passing through Zoom is flickering. I see it mostly in the lower half or 2/3 of the screen, which flickers for a small fraction of a second (too short a duration to see if it goes dark or distorts in some other way) and then is back in. At first it was happening maybe twice a minute, and now it's more frequent, averaging 5-10 seconds apart. I've changed all the cables (HDMI and USB) in the signal chain between the camera and the Zoom feed, and there's no change. I've bypassed an HDMI splitter I was concerned about, and it didn't help. It's possible this has happened before today, but if so, it was much less frequent -- this is unmistakable and annoying. The flicker does not appear in other apps. I would greatly appreciate a solution, because I run AV for a church, and we usually put our Zoom feed on a monitor that everyone can see (because some people like to read the live captioning for accessibility), and the flicker is going to get really distracting if it continues like this.

The frequency has gone up over the 4-hour duration of our Zoom today. I tried ending the meeting and restarting it, and things were stable for a while, but about 25 minutes in I started seeing the flicker again. We can't restart the meeting in the middle of a church service with 50 people connected, so that's not a fix for us. 

Is there anything we can do that might fix this? Thanks for any guidance you can provide.

I'm having the same issue. Even bought another webcam, thinking it was the problem. Nope.