Its most likely the same bug that even on offical server never was fixed and most likely overlooked because very low players played siege on this server (until recently). If it is the same bug still around its mostly comes to good timing with rouge -> click tower and insta hide (if fast enough guards will not take aggro). But its jsut a through on what could be the matter since i never tryed it out on this server or played pvp at all. But yeah should get fixed since its true that otherwhise its hide and seek xDDD
As Cruvor said it should only be possible to take towers if guards are dead, having them in fight wont solve it since people can just run in with a tank and use rouge hide again while tank goes away or (if possible on the server) use a immune food/skill to take over the tower.
You dont need to click tower to capture it right now. You just need to stay nearby. But you can stay far away and capture
ah okay then you can ignore my post