@GavinT If you have ISP router, you should check if it is router that loses Internet link. Also, you could switch Deco mesh to Access Point mode: in all things networking it'll be relying on ISP...

@rhbmcse My 2 cents. Satellite Deco with WiFi backhaul will provide at most 50% WiFi speed of Main Deco. This is not Deco mesh issue, but limitation of WiFi technology. If you are getting 400Mbps on...

@FredericNg It would still be useful if you could share screenshot of that page. In one case, powering off all Deco units and then powering them on restored some features missing. You should try...

@FredericNg I have seen this error message when there is Deco unit in Deco mesh which does not support Connection Preference feature. What else do you have in your Deco mesh? It'll help if you could...

@AbeTasticx Before you do return your X50-PoE, check in Deco app if new version of firmware is available. It is under More/System/Update Deco. If there is, updating firmware might fix issues. I think...

@AzizaC At my house I am using TP-Link SG1005D - this is one of the switches from your list. It is definitely compatible with Deco.