Nighthawk Mesh Wifi 6 Router MR60 losing connection to 2.4 devices

I know I may be in the minority here but I do not have any of the disconnect issues (I  do have all all three units WIRED).    Even when we had the storms, etc,  I did not have to do anything manually, it seems like even after power outage, all units came back w/out any issue.  I'm still about a couple weeks within the return window at Costco, as of right now I do intend to keep this product since it works fine.   Other similar products that I've tried  worked pretty much the same in terms of  speed/reliability and the only way I was able to   maximize speeds was to have the units hard-wired (house with basement, two floors about 4500 sq ft).

Thanks!