When I was digging up a trail ruins My inventory was full and I tried to join the blocks with the same type I already had and it wouldn't let me put them together in the same stack as shown in the video, after about 2 minutes the stack I had changed, for example the granite stack that was 29 items then it became 31 items and you could move and place,   Apparently my character did not grab the blocks and although it came out that there were 29 items there were really 31 and after a while it was already correct, it has happened to me several times and whenever I try to interact with the stack bug the game starts to lag