Single Player, PvE, North America
Glitch: At the Leyshrine of the Friends, mining seems to produce a graphics glitch on certain items.
Brimstone and Iron Ore – when harvested to the point of the object breaking, the animation plays for the pieces falling apart, but the original object also stays (like it was never hit). So it produces an overlap of both objects: present and untouched + broken and in pieces.
Rocks in the area, however, functioned normally.