I was in a world and a got off in a village, when I came back on Minecraft the world picture was covered with Alex faces but white eyes, also me and my friend keep seeing a black player looking entity that appears in the mountains on both our realms.
EDIT: The black entity sets fire on everything around it when it disappears. With no flint and steel in its hand. We think it is a corrupted AI from when the Minecraft testing was made.
I could not send a picture of the entity because it disappeared too quickly. And as for the world when I looked in the villagers had white eyes.