Not a bug per se but definitely an issue…
When you take down one world for maintenance, you really need to either disable WVW or take down the other two worlds in that group’s match.
Last night you took down Jade Quarry for more than an hour. One of our opposing worlds remained up and took advantage of the opportunity to retake all of the borderlands while we were completely unable to defend or counterattack. Not a nice thing to find when you log back on after maintenance.