I had the same issue on my RPi3 after a complete new setup with 2.46.
When scanning for available networks, all my SSID’s (using Cisco AP) did not show up, just one foreign SSID.
What helped me, was changing the used driver in the /etc/network/interfaces file:
pre-up wpa_supplicant -B w -D wext -i wlan0 -c /opt/max2play/wpa_supplicant.conf
pre-up wpa_supplicant -B w -D nl80211 -i wlan0 -c /opt/max2play/wpa_supplicant.conf
Hope that helps