Exactly, this isn’t a bug. The other day we’ve had a thief in the lord room of garrison on desert borderlands for hours. We came in with golems at some point and the thief simply never left and didn’t get killed by their scouts, despite them camping the lord room at some point because we kept getting ported back in. Is it fun for the people that own the keeps? Not really. It annoys me too when it’s being done to us. But it’s not a bug. Anet woke up one day and thought it would be a splendid idea to give thieves a portal, knowing that thieves have the ability to permastealth and hide forever that way if they want to. There’s no point in reporting it because no one’s doing anything wrong. It’s the game the way Anet designed it. They should have given that whole thief portal a second thought but seeing as they didn’t, have fun with it. There’s a spot in fire keep where you can hide, as long as you glide into it while you still own the keep. You used to be able to get in there by jumping, so people who didn’t own the keep would often do that and then port their people in. They were exploiting a bug. The ledge they used to do that seems to be gone now because Anet fixed it a while ago, you can no longer jump into that spot, but you can still glide in there if you own the keep. You don’t get marked when a keep flips, so people hop in there before the keep flips and wait to port their people in again later. The thing is that as soon as that keep flips, you can also get in there and murder them to prevent that from happening. It’s not really any different from any other mesmer hiding spot these days. Just remember to check it after flipping fire, you gotta sweep anyway.