To begin with I love the new copper addition but with all experimental features enabled (hey this is Beta testing why the need?) I have noticed any array of bugs.

Bug #1: Fully harvested wood from trees do not have the leaf blocks auto degenerate.

Bug #2: Sheep eaten grass soil patches never grass regenerate.

Bug 3: Planted crops never grow!

These bugs seem kind of related.

Beyond that the only other bug noticed is that main inventory items can get sticky refusing to leave their inventory slot place. Go to move it and it just bounces back. The workaround is to throw sticky items away followed by picking them up again.

I also noticed one "feature" when I was moving items from inventory to storage when I suffered accidental game shut down. Upon reloading the items I had moved to the chest were found in both inventory and storage. I did not try a repeat but a nice way to double your valuables!