tl;dr; We are updating a piece of network hardware on Thursday, June 15, 2023 at 21:00 UTC, that will cause some internal traffic disruption for about a 1 minute duration. It's possible this could manifest some errors on the site while the network hardware restarts. The window for the update and restart is 1 hour from 21:00 UTC - 22:00 UTC.
Short Version:
There's a bug in a piece of network hardware that caused the normal update process, which supports redundancy, to fail. This is forcing us to update and restart the unit that is actively handling traffic. We have performed this update process in our disaster recovery site and it was quick and uneventful. You can keep an eye on the maintenance via our status page.
Longer Version of What's Taking Place:
I can't really think of a longer version. I'm not Tolkien after all. We just always have this section in our maintenance notification, so I figure I'll roll with it. Plus it helps the "short version" section make sense.