CAN'T JOIN FRIENDS' WORLDS

Ever since the latest update my kids have not been able to join an LAN games either on the xbox one, ipad or my cell phone with their friends. I have tried reporting this to xbox, mojang and anyone else that'll listen!!! PLEASE FIX THIS BUG my kids want to play their game online with their friends..... Getting error message "could not connect. outdated client." versions 1.2.13 or 1.2.16