If you aren't aware of the usual progression of the Arena Pass realm, it's cut into several chunks. We start off with the practice phase, where players are intended to form teams, make friends, get some cohesion and work together to get a group and a comp that's good for them to progress into the next phase.
That phase is the rated phase, and itself is divided up into chunks, but it's when things get serious on the Arena Pass realm. Team ratings are wiped, everything is reset, and the competition begins for real. But right now there's a problem, as Blizzard Community Manager Daxxarri reports:
We have become aware of an issue that has prevented Arena Pass teams from being reset. To allow for time to resolve the issue and allow teams to plan accordingly, we currently intend to extend the practice phase and instead begin the rated phase of the Arena Pass on August 6. Currently, the conclusion of the rated phase is still planned for August 27.
We appreciate your understanding in the meantime, and look forward to fierce competition when the rated phase begins.
It's a little surprising, perhaps, given that the start of the rated phase has been pushed back a whole week, the end of the rated phase hasn't received the same treatment.