There was an issue completing the final step of the mission that only showed itself when there were multiple people trying to do it at the same time. Would have caused a lot of problems for a lot of people and unfortunately we were not able to get a fix in place in time for 6/28. We decided to push Guss out of the update instead of delaying the release of Chapter XV.
Thanks for letting us know, Ben.
Now that you've made your cutesy-funny announcement, would you care to tell us what the actual issue is...?
...or do we, your paying customers, not get to know that?