@David-TP Thanks for following up, and I do agree this is odd. Yes to both your questions. Turn off Wifi to laptop, Ethernet from laptop to Main Deco, unplug external monitor and speed jumps up to...

I noticed that every time I plugged my MacBook Pro or Air directly (via USB C) into my newly purchased backhauled X50 Pro Access Point the speed drops to ~450 Mbps. If I plug the MacBook directly...