@NetanelC Looking at your network diagram, I have a question: do you run Deco mesh in Access Point mode? If you have Deco 1 and Deco 2 connected to the gateway by Ethernet cables, that is only going...

NTGm wrote @Alexandre. I looked at the article that explains how to use the preferred connection approach and it specifically states the devices the article applies to with my model (Deco M9+)...

@relayman I haven't seen something exactly like what you describe. Main Deco requires good and stable Ethernet connection. If Main Deco loses connection to ISP modem/router, different issues may...

@relayman I would like to interject into this conversation with a suggestion. Would you please swap Main Deco and Satellite Deco, so that Main Deco is on the left side of the picture. For Deco mesh...

@NetanelC I may be able to suggest workaround, which is to rearrange your network layout, but I need more info from you before I can do that. You must have more than one Deco X20. If you do have more...

@NetanelC On your PC, check what Ethernet speed it negotiated with Deco X20 it is wired to. See How to check the associated/link speed on a wired client If PC negotiated 100Mbps, you'll need to focus...