The WiFi.scanNetworks is not able or with same difficulties to found the Access Point.
Currently I am using the http://arduino.esp8266.com/stable/package_esp8266com_index.json (2.0.0) and all goes well.
WiFi.mode(WIFI_STA);
WiFi.disconnect();
delay(100);
ApSsidFound = WiFi.scanNetworks();
Bytes used:
Version: 2.0.0/2.1.0-rc2
Sketch: 220,286/239,820
Global: 35,112/33,220
amelia