The phone keeps telling me the wifi is poor quality and switching back to mobile data

Phones Do support 6ghz but devices they connect to do not and I wanted them on same network. 6ghz seems to want to be another side, like iot.

Web interface shows backhauls are good.

Internet speed tests are showing ~500mb/s.

It seems to me to be sticky connection to satellites, with slow handoff between satellites as I move around the house.

If I go through the check you want what am I looking for? It's a long time gathering information - I need to know specially what I am looking for.

At the end of the day it's a consumer product and I expect it to work as advertised. As I said, it seemed to be fine for the first year or two. It doesn't look like it is a problem unique to me and I don't see resolution on the other cases. I was hoping it was a known issue with a known fix.