So Vizio has actually told me that it may be a resolution issue from the Pi3 because the HDMI port that I'm using (I need to use this particular port because it's the lowest latency port) is meant for:
2160@60hz 4:2:0 Chroma 10-Bit color 1080@120hz 4:4:4 Chroma 10-Bit colorIs there a recent change in 4.1 that could have affected the video output? Because this only started happening with 4.1. 4.0 was always fine.
Even though it seems to be sporadic in 4.1
I'm not seeing 1080p @ 120hz as an option here https://elinux.org/RPiconfig
Is that option just not possible on the Pi3?