Can we assume your Node 2i is plugged directly into the router with a good cat7 cable? Or, if you are going through a switch, is it a good quality gigabyte switch and cat7 cables all the way?
I would play analog sources for a while to see if the problem returns, to rule out the preamp & amp. Also, upon hearing the issue when streaming, switch to a in-progress analog source quickly to see if the issue carries on or stops.
I have seen a few gigabyte switches do unexplainable, weird stuff...could try swapping out the router or switch.
Do you have a way to stream that doesn't involve the Node 2i? If you can stream from a phone or laptop via Bluetooth, USB or even a 3.5mm stereo cable...try some extended listening to see if it eventually deteriorates too. Try it with your Qobuz, Tidal and even Youtube...to eliminate the 2i's streaming functionality or to pin the issue on it.
I would play analog sources for a while to see if the problem returns, to rule out the preamp & amp. Also, upon hearing the issue when streaming, switch to a in-progress analog source quickly to see if the issue carries on or stops.
I have seen a few gigabyte switches do unexplainable, weird stuff...could try swapping out the router or switch.
Do you have a way to stream that doesn't involve the Node 2i? If you can stream from a phone or laptop via Bluetooth, USB or even a 3.5mm stereo cable...try some extended listening to see if it eventually deteriorates too. Try it with your Qobuz, Tidal and even Youtube...to eliminate the 2i's streaming functionality or to pin the issue on it.