You are unable to rename a world if it has a long title. This often happens to worlds that have been copied and that the game adds the time and date with the copy attribute after the world name.

When you click on the title, the cursor stays in place and typing text on your keyboard does not add anything. Hitting backspace or delete does not remove the characters. I am able to use the arrow keys to move between characters, but this still does not change the fact that delete, or backspace does not remove characters and that typing new text does not appear on the screen.

When you initially click on the world name text box, the cursor automatically appears in-between the timestamp rather than at the end of the text.