Dungeon fog wall bug / objective bug

Some Dungeons that require you to kill an elite to progess the dungeon is blocked by a fog wall that says “fight in progress” not allowing me to in despite me going into the dungeon alone, killing every mob in the area or doing the previous objective if there is one. Leaving the dungeon, going to the character menu or closing the game doesn’t always fix it. Had to uninstall and reinstall 3 times now for it to work.