[rolph]

HDMI is soon to become a perpetrator. HEC compliance is not extremely common for the time, but it will become a leak.

HDMI with Ethernet: What is it and How Does it Work?

https://thehometheaterdiy.com/hdmi-with-ethernet/

Understanding HDMI vs Ethernet vs. HDMI with Ethernet: The Guide

https://nassaunationalcable.com/blogs/blog/understanding-hdm...

https://en.wikipedia.org/wiki/HDMI

You need to do something about pin14 on your HDMI port and maybe go without ARC capability