Hello @Michalis_Papaeconomo,
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.
Does this behavior only occur on the MC200 zone or does it occur on other zones such as “System Output” for example? Have you tried rebooting the Core, MC200 and networking gear yet?