I believe I was able to resolve this issue. There is a combination of things that work, and you may have to modify the steps for you.

The first step is to turn off UHD in your TV settings. I only use Samsung TVs, but it is either called HDMI UHD or Input Signal Plus. For some reason, this setting causes constant flickering. Something I noticed on the Samsung TV is that, even if you turn Input Signal Plus off, if you have "Game Mode" turned on or set to "Auto", it will automatically enable Input Signal Plus periodically and cause the flickering to return.

I turned off Game Mode and Input Signal Plus, and the flickering went away.

Another setting that you can mess around with is in the NVIDIA Control Panel, and allows it to work even if Input Signal Plus is turned on.

Open NVIDIA Control Panel > Display > Change Resolution > Choose your TV > Scroll down to "Apply the following settings" > "Use NVIDIA color settings" > change "Output color format" from "RGB" to "YCbCr422"

This color format appears to reduce bandwidth and also eliminates flickering. The only issue is that this setting seems to occasionally reset itself and cause the flickering to return.