Thank you for the report, @Merrill_Wettasinghe!
To start, may I kindly ask that 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.
Additionally, can I ask that you please verify the following:
- Since noticing this behavior, in addition to the Core, have you tried rebooting your networking hardware and NAS?
- Do you have any active antivirus or firewall on the Core machine?
Regards,
Dylan