Bug Reports:
(1) Duplication Bug:
Any time you try to merge multiple stacks (via the Chest), if you select the second or later stack, the game will put/remove the items from the first stack it finds instead of the selected stack (using the count of the selected stack). Done right, it will put/remove the items without changing the stack count, allowing the player to infinitely duplicate any (stackable) items. (I figured this out when I ended up with so much inventory I could not even craft a new chest to hold all my items and had to restart my game--which leads me to the next bug....)
(2) Save/Load bug:
When saving/loading, it loses a lot of information about items placed on the map. In particular, anything to the left of the player on the same row is lost. Likewise, anything above the player is also lost. It is as if the game treats the players position as the start row/column, and loses anything prior. I am now in the habit of always moving to highest leftmost position before saving (I actually used bridges and dirt ground to ensure there is a spot that always comes before any other).
(3) Not really a bug, but a game play issue (and what led me to uncover the previous bugs):
Sitting idle for a long period of time generates so many resources that it becomes impossible to move or harvest/mine them all without inventory overload. I suggest two things: First, limit how many of each resource it will auto-generate. Second, add the ability to trash/destroy items not needed. I ended up expanding one island to a full screen size covered with chests filled will resources I had no use for.