I see this was posted in 2019 and it is now 2020, however, I also see that no one has explained the importance of having a good HDMI connection. I had a latency issue for several weeks and finally talked to Xfinity support. I was told to check my connections, which I had already done, all looked good. The technician had me uplug my HDMI connection and plug it back in and this corrected my latency problem.
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