Won't connect me to game when partied up

Since the last 2 days I've had an issue with matchmaking. It takes forever for me to join a friends party, and even after i join i don't see my friends in the lobby but they can see me. When i ready up i cant see that I've readied up but my friends can see that I've readied up. I also join the game a long time after my friends join, and it skips the entire legends selection screen. Every 3 games i wont join the game at all but my friends join the game. If i try to leave the party and rejoin it wont let me leave the party even if i press leave party countless times. This problem doesn't happen when i'm playing solo, but only when i'm partied up. I would really appreciate a fix for this. Thanks in advance.