Hello there, Thank you for getting back in touch. We understand you're still experiencing the Marionberry error code on your Xbox Series X. This does seem strange to us. You not experiencing connectivity issues with other devices may suggest the issue lies between your Xbox and its connection to your modem or router. We would recommend you try to [url=https://help.bungie.net/hc/en-us/articles/360049024092-Optimizing-Connections-Improving-Latency-and-Packet-Loss]Optimize the Connection[/url] for your Xbox as a next step, to see if that helps. If optimizing the connection doesn't prove effective, then the steps in our [url=https://help.bungie.net/hc/en-us/articles/360049496751-Advanced-Troubleshooting-UPnP-Port-Forwarding-and-NAT-Types]Advanced Troubleshooting[/url] guide may hopefully resolve this. Please let us know how this goes.