[BUG] The Pattern of Chest will be Invisible when Looking at a Random Place

As the title says, I want to report a long-time bug that hasn't fixed yet, and it is that when I looked at a chest, the one or two(or more) adjacent to what I was looking disappeared! I, then, turned my head and it appeared again when I looked at the invisible pattern.
That was extremely strange and interesting<?>, wasn't it?
I think the bug should be fixed so that we can have a better and smoother gaming experience.