I have the 1st gen 802.11n Airport Express (7.6.3) setup to join a WPA2 AES wifi network. Everything works fine for a while, but every now and then, about once every day or two, the AirPlay feature becomes unresponsive and disconnects from the network. Sometimes I still see the AirPlay device name in my available AirPlay devices list, and sometimes it disappears from the list, but either way, I find I have to restart the Airport Express to have the AirPlay feature reconnect. After a while repeating this process becomes frustrating. Is this happening to many other people? Am I doing something wrong? What recommendations might I try to resolve this. Thanks.