So I started a new game recently to play around with a little pony, when I enter far enough into my first dungeon to encounter a Treasure Chest it turns out that I can't interact with it because it's symbol is over a cave wall tile, so leave and go to another thinking it's an isolated incident, four dungeons later, every chest I found actually turned out to be a cave wall.
Also of note there are several times when I enter a set of stairs or a door and have it not appear on the next floor as it gets replaced by "stuff", it leads to a lot of back tracking to find out where your exits have hidden themselves.
