Muted

Hi,

I'm unable to join any party now cuz I got muted it seems.
Can I ask why and how long?

Only thing I can think off is when I was in a party, we did our objective (killing vaal boss).. and went to act 3. After that I went afk at the waypoint and forgot to leave the current party.
When I came back I saw someone joined and was mad at me cuz I was afk and did not help him. (He thought we were still doing the vaal quest).

Grtz,
Brecilos