Dobbin Gold Sacks spawning behind walls or below ground. And sometimes are hard to see as well.
Its really frustrating to see Sacks behind the gate walls or behind map walls or even below ground where you can see them but still uncollectable. In comparison been playing Bloodspike and never ran to this issue in 20 or so maps i played. Also tha bag being very light transparent gold occasionally blends with the environment especially in primarily white maps like Avalance and Falling Folly making them hard to spot.