My ISP box provides 2 kind of SSID: One that provides GENERIC access for alternate customers trying to roam from nearby. It cab not be deactivated. All other SSID are user defined. 2 are set here: 1 for 2.4 Ghz & 1 for 5 Ghz There can be hidden or suspended. Here they are both active and unhidden. LiveGUI only shows the first. Since it can not be hidden neither suspended, user defined can't be forced to be detected at first. Reproducible: Always
I wonder if your user-defined networks are TKIP-enabled and thus unable to be found by wpa_supplicant which has USE="-tkip" by default.
tkip is indeed set on the box, will try removing it, and post results here.
Unsetting TKIP did the trick, with AES activated still. Since I'm unconfortable with KDE, I can't tell whether lack of TKIP is easily retrievable from settings. If not, it could be worth to be mentionned somewhere. Unaware if AES considered strong enough... Thks
Side note: Initially single visible SSID, aka hotspot feature, has no security setting such as TKIP or AES. Hence it has been detected from the start.