What I expected to happen was:
That everything went well in this snapshot

What really happened was:
In the trees there was an error, which showed these flashing intermittently, I think this is due to the change in the graphic engine of the game.

Steps to reproduce:
1) Enter any world.
2) Get moving the camera or view of the player until the bug is caught.
3) At an exact point it starts to flash, but I think there is no exact way to reproduce it.

There is a video attached, where the error is shown.