In Heaven Sent, all the rooms reset to some initial state after a while. The fireplace room has dry clothes. Is that its initial state? It is of course implied that those dry clothes belonged to the previous Doctor clone, but if a room resets itself, then there shouldn't be any clothes there. Does this mean that the clothes the Doctor finds are not actually from his previous clone, but rather, placed there by the designers? Did they actually anticipate he would jump into the sea? Clara's painting is "extremely old". This reinforces the idea that 7000 years had passed. But if the room resets itself, shouldn't the painting be restored? Perhaps the "old look" is in fact the initial state of the painting, but this would imply that the castle designer purposefully made it old, which would bear the question: why?