@Richard_W I was on tvOS 13.4.6 and had the same problem with my Apple TV 4K, acting has a HomeKit hub. I tried two things: 1. Upgraded to beta of tvOS 14 and rebooted. (problem was still there, only now a red warning bubble appeared in front of HomeKit in Settings. 2. Reset the Apple TV 4K and set it up from scratch. So far, the problem seems to be gone after 10 minutes with the Apple TV 4K sleeping. A bit more background on my set up. My Apple TV 4K seemed to work fine though earlier version of tvOS and may have started exhibiting this issue in May 2020 when I upgraded from an SMC 100Base-T ethernet switch to a Cisco WS-C2960S-24TS-S. About this time, my family and I noticed that Home app outside of our home's wifi was no longer working with HomeKit. With the Cisco managed switch, I was able to see half of a million " Total Receive Errors"... Since I made the change, the Apple TV 4K's Total Receive Errors haven't increased and are holding steady at 495,436. I may not be back here, but I'll post updates about my experience with this issue here.
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