I experienced this a couple of times yesterday, but while on 10166. SP3 was sat there happy as larry, S3 suddenly quit. Both connected to same plug.
Mine was coming out of Connected Standby, SP3 had been in heavy sleep I believe as it had been unused all night then tried to connect to the network at my office and got Limited so then I tried my mobile hotspot and same thing. Rebooted and it connected perfectly.