From post #11:
Wouldn’t you agree that this at least suggests some kind of network-related issue? You talk about replacing switches, so it looks like there is the possibility you’d been having flow-control and/or packet-buffer issues on the path between the NAS and OSMC device(s)
If you’re up for it, you can always run ifstat on OSMC and see if there’s any discernible pattern to the network data when an error occurs. It’s not part of the standard OSMC build, so you’ll need to install it first. Then run:
nohup ifstat -nt -i eth0 >/home/osmc/ifstat.out 2>/dev/null &
It’'ll run in the background even after you’ve logged off and will record around 20 bytes of data each second, so you’re not going to fill up the storage space any time soon. If an error occurs, you should check its time from the Kodi log (/home/osmc/.kodi/temp/kodi.log) and see if there’s anything obviously occurring on the network interface at the same time. I find that importing the data to a spreadsheet and graphing it can often be very revealing.
Remember to kill the job once you no longer need it.