Multiplayer Connection Bug on Minecraft PE v0.9.0 Alpha Build 4

Whener I try to join my brothers Alpha Build world, it keeps disconnecting me, From my point of view, when I click on the LAN server world, it says the world is loading, and after a few seconds of getting in, it sais "Disconnected From Server" Messege, From the host point of view, the world is like normal, but when I try to connect it displays the "(Username) has joined" messege twice, no disconection messege. To get this to happen It is an android world host and then an android joining, both alpha build 4 versions, my current phone is the LG Optimus L9 and my brothers phone is a Samsung Exhibit 2, I have tried with different android devices and the problem still persist.