Hello @Yiannis_Kouropalatis — Thanks for sharing your report with us!
To start, 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.
Since the update, have you tried rebooting your Core machine, and affected remote devices and endpoints, and any relevant networking hardware?
Is this behavior occurring for all endpoints or just specific ones?
Thanks,
Dylan