We've passed on all the information to the game teams, so they are investigating and making sure that these objectives are working correctly for everyone. We'll let you know once we receive any updates.
Please note that you only need to complete any 3 out of the 4 objectives to finish the group. Once you complete any 3 objectives, the 4th will no longer track progress or provide additional rewards. Essentially, one objective will always remain incomplete.
Try also to claim your reward via the companion app for now.
This thread will continue the discussion started in our archived thread here