Can you help to do this:

First, use your pc to conenct to the wifi directly and get the BSSID (mac address).
In your windows powershell use this command and you will find bssid. This will help to identify what is the vendor of the AP.

netsh wlan show interfaces

Then, if your UI scan goes to 99% and just stops, can you do this, ssh to the router and use the two command to scan. It will show scan list of 5G and 2.4G wifi.

iwinfo ra0 s
iwinfo rax0 s
logread

It seems some wifi names and info break the UI.

Pls do the above and send me the output. I suggest you use 3.212 beta3 to do it so that we are at the same page.