Hello @sg86 ,
Thanks for reaching out and apologies for the delay in getting back to you here. So we can better assist you, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
What kind of NAS are you using to mount the folder? Can you share a screenshot of Roon Settings → Storage? Can you reproduce the issue, note the time + date of occurrence and then use these instructions to send us a log set for review?