I would echo @musicjunkie917 's suggestion earlier: can you replace your Netgear GS10SE with an unmanaged switch temporarily to see what effect that might have?
For years, I’ve had a cheapo 1 Gbit network switch (a Konig CMP-EHUB52 ) at the hub of our home network. Whilst the network, and Roon in particular, has been running faultlessly, I thought I’d swap it out for a more modern switch, with simple management features. I bought a TP-Link SG108e , which has had good reviews.
I swapped the switches, and immediately Roon started giving lots of problems. Sub-second dropouts and skipping in playback. Sometimes at the end of a track, Roon reported difficulty…