BUG- Party Members may not Join match found

Sometimes when friends join my party, often as soon as I search and find a match, I (The party Leader) will enter the match Like normal, but my party members are left behind in the lobby waiting to join despite finding a match starting up or even in filling with player stage. 

Odd bug that happens and leaves my friends confused when some of us are in game when the match started but some are still in the lobby, especially when we waited for a minute for the game to fill up.