Hi there! There's currently a Known Issue with premade groups of 4 when queuing for Group Finder. Unfortunately, this is manifesting in several ways, as you noted here. We apologize for the inconvenience and are working on getting it resolved; due to the way the issue is manifesting, the team is taking extra time in testing the fix once it's ready. We'll keep you updated when more information as it becomes available.
This has happenned twice to me also. Is there a work around, besides using a real pug? Do I seriously have to put a ticket in for every random hard mode I run to get my black hole commendations? And as far as putting the tickets in, am I gonna have to document everything? ANd what about getting credit on the weekly 3 hard mode quests, and daily single hm quest? tickets also?