ORBI RBR850 and RBS850 - Slow switching between devices

Well first of all thank you for your help. Before I posted this I spent 2 hours with tech support and didn't get anywhere, they didn't even understand the issue and just said as long as I'm connected I should be fine.

You have been a lot more help. I bought this as a performance system an upgrade from Google WiFi to get quicker speeds. 

So I lowered it first to 50% and then even to 25% and still no luck. After lowering it all devices disconnect, so I put a phone near the satellite and put a tablet near the router. 

As expected the phone connected to the satellite and the tablet connected to the router. Each tested at 600+ Mbps the high performance I bought this for.

I then swapped the phone and the router locations and both still stayed with their original connection, phone stayed connected to the satellite even though it was now 6 inches from the router, and the tablet stayed connected to the router even though it was now 6 inches from the satellite.

Now each device was only hitting 150-200 Mbps, because they were connecting to the device further away. Still fast I understand ... but not the 600+ Mbps I bought this for. 

If I reset each device, it again connects to the closest and achieves the fast speed again. I wonder how Google does it ....as theirs always works very quickly .... but I'm stuck now.

(still appreciate the help you gave though)...