Is my ST the culprit?

I have the same issue happening here:

I am totally new to Roon but very deep down the days & days of troubleshooting. Where is your music stored? I am trying a test run today of loading a few albums on a USB drive and letting it play. So far, it ran 4 hours straight uninterrupted. I disable my NAS drive completely for this test.

You should open up a separate support ticket here:

https://community.roonlabs.com/c/support/6

Also reach out to SGC. SGC will do a remote Teamviewer session to your PC to see what’s happening with the ST

You can download teamviewer for PC here.
https://download.teamviewer.com/download/TeamViewerQS.exe

Or you can download teamviewer for MAC here
https://download.teamviewer.com/download/TeamViewerQS.dmg

The User ID is a 9 or 10 digit number on the first screen of the teamviewer program. It’s labeled “Your ID” ; the password is underneath it. SGC will ask you for both so they can login

Here’s how to upgrade sonicTransporter from version 2.7 to 2.8. Read it carefully, it’s a multi step process. Supposedly fixes many issues with Roon

This procedure can take quite a while if your internet is slow. Do not reboot or power off your unit until the upgrade is complete.

Go to sonicorbiter.com and click manage next to the sonicTransporter you want to upgrade. Then go to apps -> Software Manager . Click the Update button and wait for it to complete. Then reboot your sonicTransporter.

Once this is complete you are ready to start the upgrade to 2.8.

You need to manually enter the upgrade URL

http:///upgrade28.php

So if your sonicTransporter IP address is 192.168.1.10 then enter http://192.168.1.10/upgrade28.php into your browser.

Once you enter this URL the upgrade will start. It can take quite a long time. Wait for it to finish!

Once it’s finished reboot and run the 2.8 upgrade again.

http:///upgrade28.php

Again once you enter this URL the upgrade will start. It can take quite a long time. Wait for it to finish. Onec it’s done reboot again and you are done.