I'm trying to run through Darkshade Caverns solo to farm sets, but after finishing the entire dungeon, leaving, and reentering, the instance no longer resets. I've tried both manually exiting and using the leave instance option and neither reset the instance. I've travelled away and it still doesn't do anything. Whenever I enter the dungeon by myself the portal is still there and all enemies are dead, I used to be able to leave and go back in to restart the dungeon.