@14paavang I just noticed TP-LINK Support comment that X10 also supports connection preference feature, with newly released firmware update. If X10 are sold in your region, check those: similar form...

@iGOD My apologies, that's all I can help you with. Maybe someone else will read this topic and have other suggestions for you to try. I have Deco M9 Plus in my Deco mesh. They do run stable with...

@iGOD From screenshots, I don't see any obvious problems with Satellite Deco and their connection to Main Deco. Still, I would suggest moving Living Room Deco closer to Main Deco, you said they are...

@iGOD Thanks. Please also add Living Room Deco screenshot.

@iGOD When your Satellite Deco are online, open their info pages in Deco app. You should see similar to this example info: In this example Signal is Fair. Also, connection from Satellite to Main Deco...

@RayGMan I would recommend for you to do two things: 1. Bring Deco #3 to TCL TV stand and connect TV to M5 with Ethernet cable. Check TCL TV settings to ensure it uses Ethernet, some TVs may require...