Is this all running Windows 10?
Put this on the NUC with the TV use the 2.46 version.
Switch to TV mode and turn on Hardware Decoding, Deinterlace, Direct Play, Direct Stream.
If you still get buffering, you will need to upload a set of logs from the Troubleshooting “Download Logs” .
Also check the dashboard/now playing for details of what is going on.
