I used the attended sysupgrade for all snapshot images, and the firmware-selector to get onto 23.05.0rc2
I'm using 2x 2.4GHz SSIDs & 2x 5GHz SSID's and WPA2, guest on each.
OK since my last post 
Where I described the issue where I cannot ping devices on the same br-lan, restarting the network 'service network restart' fixes this issue. I've only done this within the last hour so I'll see how that pans out.
EDIT: the issue has raised it's ugly head again!