Disconnected from Warzone Assault. Cant rejoin

At every once in a long while im disconnected from a warzone game. My friend was still in the game and i tried rejoining through her and it just put me in her fireteam and told me waiting to join a match in progress and it didint actually let me join again. Is rejoining not allowed or something?

Most likely another player joined before you had chance to rejoin the game.