Just wanted to say thank you, as this was the post that helped me solve the issue with my Pixel 9.
My son's Pixel 6a and my daughter's Samsung phone had no issue connecting to the EE Smart Hub 7 Plus that I was provided when I switched over last month, but my Pixel 9 would not hang on to the connection.
Switched to "WPA3-Personal-Transition" security on the router control panel and the problem went away. It also improved the connection to my HP Envy printer which was very unstable when using "WPA3-Personal-Compatibility".
HOWEVER I've continued to have occasional loss of connection to "smart home" devices, and last week I tried connecting my Bambu Lab A1 Mini 3D printer to the WPA3-Personal-Transition network and it would drop almost immediately.
So I've been forced to do what I was trying to avoid, which is to activate the "Compatible Wifi" network on 2.4GHz and WPA2-Personal security and use it for devices that drop connection to the "Main Wifi". So far that's two printers and one light bulb, but I wouldn't be surprised if all the bulbs end up on the Compatible network.
In the future I might increase the security on the main network to full-fat "WPA3-Personal" but that will mean a hard reset on a couple of my smart home devices which I'd prefer to avoid (one example is the Google Nest Doorbell doesn't allow you to change Wifi network after the original setup).
Strikes me that the "improved" security of WPA3 is great in lab conditions, and may be a useful step forward in corporate environments, but it's pain in the backside for normal consumers.
