The Stone brick's texture can be seen as a rectangle on top and 2 squares on the bottom. When we turn them into stone brick stairs, the cornerback side turns into 4 squares, just like the texture of a purpur block. This make builds look off, and awful, This annoys builders when building waterlogged walls, or something like this. I do not think that this problem works with every kind of stair, but we should try them and maybe fix all of them.

To reproduce the issue, follow these steps: 

• Prepare at least 3 stone brick stair blocks
• Build them into a corner stair, like an L shape
• Make sure the corner block has a quarter open on top, not three quarters.
• Go to the back side, and observe "the beauty of the stony grayish purpur block"
• Make sure to make 4 versions of corners, each pointing either southeast, northeast, southwest, or northwest because they have different textures.

This is a video to visualise the process:
https://hanoi01-my.sharepoint.com/:v:/g/personal/0132549206_hanoi_itrithuc_vn/EVspbgwypa9NnWbda3TdY5sBMprGx3LxZKZnxG1Zg0WjGA?e=P2LcvU

This is the world in my video. You don't have to find the stairs because, in the place at which I upload, you can just look around to see the glitching stairs.

https://1drv.ms/u/s!Aqd5tXnNlfyYzzj8xR1iCUwyLAjW?e=jTW60f

In case something went wrong, go to -48 29 5 to see the stairs. I have a double staircase in that room. If you still cannot find the place, you can go to the coordinates but on the ground level - at which I have flattened the ground to sea level - and find a rather large square house next to some pumpkins, cows, and cats. Next to that house is a smaller one, it has come cacti on top, and some kelp below. Open the door and go down the blackstone tiles stairs. The first basement should let you see the bottom of the kelp and some furnaces. Go down one more, you can see some sugarcane covered in glass. The suspicious stone brick stairs are located on one side of this room. Go down THAT staircase, and you should be on y=29. Just go to the back of the staircase and see the "stony grayish purpur block"

I do not know if I have written too long, but, well, the more the merrier,