Constant crashes with minecraft majestic and minecraft grunge purchased re-skins

Been trying to play with a friend, and every time we start my game crashes within 3-5minutes of joining his server. The wifi is reliable and right next to us, so it seems to be a problem with the game.

 

I Uninstaller and reinstalled the game, and the skins, and it hasn't fixed it. In addition, every time I am kicked, it makes it so he has to recognize the game so I can see his server again. 

 

Super annoying.