Server is Win10.
Client is Shield 2019 Pro.
Speedtest between the two is 1Gb.
Now, if I stop playback and then restart playback, it's smooth again for a few minutes.
Repeat over and over.
Works great for a few minutes.
Starts herky-jerky playback.
I stop and restart playback.
And it's great for several minutes.
I've rebooted both server & client.
And am running the latest pre-release.