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.
If you guys would set up the Test Server and actually pay attention to posts when we tell you something is wrong you could save yourselves a lot of hassles!
Instead BioWare pushes out fail patches and bugs that make fixing them twice as big of problem.
Face facts BioWare the current method sucks.