I build one handcart.
Went and got some "Stone Block" empty it and then took it out to another stone deposit.
When I returned to my house the "old" cart was still there.
@root Can you use the "second" cart?
We had such similar at A2.1.1 i believe.
But if you relog, it should be gone, so it is just a visibility bug, i think.
I can use both carts and also I logged out and back in and I still have both carts.
Also once I build my house walls one of my carts got stuck next to a wall and can't pick it up.
Hope this helps.
P.S. great job with the game though, really enjoyed playing.
I also had this multiplication. I made one, dragged it to a stone deposit, collected some stone, started dragging it home, game froze, character turned invisible, assets in world turned invisible, I closed game, reentered and had two carts holding the same amount of items.
All items usable, still have both carts.