Sorry for possible double post, maybe you delete bug-reports that are already fixed ;)? Or better: do a bug thread for each version :)
in Alpha 5, the inventory is buggy too. When I now eat for example the last berry in my inventory the item after the berry or at the last inventory slot will just disappear, it is all lost then.
Additionally the item stacking is not working fine in alpha 5, i have gold bars in 3 slots. Look at the image.