Asked the box disappeared

This bug is a total of three problems 

The first question After the box is destroyed  it appears three seconds later 

The second problem  the destruction of the box is that there is no particle effect , Disappear out of thin air 

The third problem  the wall tiles can not be connected together 

中文：这个bug一共有三个问题 第一个问题 方块破坏后三秒之后会出现第二个问题 破坏方块没有粒子 效果，凭空消失 第三个问题 墙砖方块没有办法连接到一起