I just got the Witch's Tower from a mystery box today, and when I tried to place it, some of the terrain and trees that should have shown up behind the tower were displayed in front of the tower. As of this writing, it have the tower placed in sec 7 on a penninsula, and there is a shrub in front of it that should be behind it, and some of the trees are in front of it and obscuring the tower when they should definitely be in the background.

Something interesting that I noticed was that when the building plot was laid, it was placed inside a clump of trees, which while appropriate for the tower, may have contributed to the layering issue?