2020 macbook air ethernet disconnection problem
I am having a similar issue with the Thunderbolt 3 Dock from Belkin, when i am using it, then it is ok, but when i send my laptop to sleep, or turn it off then the whole network collapses. i opted for disconnecting the cable from the dock every time i send the laptop to sleep or turn it off. i know it is not the best solution, but probably in the meantime you find a solution you don't have to suffer the interruption of your home network.