I have two XE75 Pro units in my home.  One is main, the other is a wired mesh point.  

My landscape lighting around the base of my home (stone) has always had trouble reaching the main XE75 (closest) in the house.  I figured I would add another, cheaper Deco mesh point in the basement to reach those external lights.  

However, as soon as I add the X50-POE point to my network I lose the ability to choose a Connection Preference for the all connected clients in the Deco app.  The option is just no longer on the client screen.

I know the X50 is only WiFi 6, not 6E, but I didnt see a point to buying another more expensive XE75 just for a dozen 2.4ghz outside lights.

Did I lose Connection Preference because of this 6 +  6E combination? 

Or is it because the X50-POE only has 2 bands where the XE75 is tri band?

Or is this a bug?