@iajaffe So I disabled OFDMA and Smart Connect and the problem goes away if I only allow 2.4 OR 5 networks.  Unfortunately, I have devices that will not connect to 5 and need 2.4.  And 2.4 is too week to cover my whole house.

 

I have not tried the guest network, but that would be unworkable as I would not be able to control the devices on my wifi network.

You want the 2.4 network to have a different name and not even be registered with the phone in the case of Galaxy. This isn't new, I saw it with two separate networks and a ZyXel on the Note8, and the same on the Note20 Ultra on both ZyXel and TP-Link. TP-Link just makes it more confusing because of the default smart connect feature. Basically as soon as these phones lose what would be a bar of wifi in the display, they switch to the 2.4 network regardless of its speed (it's usually still slower at the distance they pick). After it switches to 2.4, and despite supposedly having dual band functionality in the Note20 Ultra and Triple in the S23 (there's a 6e antenna there too), it will never reconnect to the 5GHz networks because regardless of range the signal always appears stronger. I don't know why these phones don't just use both antennas, but there you go. Another fix I found for it was setting beacon time to 90ms instead of 100ms. The Note20 Ultra can connect to the AX network fine, but the connection is faster and stronger with OFDMA turned off on the modem, and even stronger if I switch to the 802.11a/n/ac option. Part of the issue is that beamforming works about as well as an addict who got some bad junk and shot up in the broom closet, and since they lowered the maximum allowed broadcast power. I suspect that beamforming might actually work but was advertised horribly wrong. AFAIK you can't put a signal out on a piece of bare coax looking antenna that's fixed in space and make it point in the direction you want. I think what it's *really* doing is picking the antenna that's pointed most directly towords the phone. AC will pretty much always get a better phone connection by virtue of outputting a higher powered signal. This isn't how it's supposed to work at all but there you go.