Book unreadable when going to other person's world and reading his own made book.

Reproduction of Bug Steps
1.In your own world make a book with 1 page filled.
2.Sign and create it when finished.
3.Open LAN.
4.Let other person join.
5.Give that person a book to read.
6.WHEN HE OPENS IT THEIRS SOME WEIRD WRITING OVER IT SO,THAT PERSON CAN'T READ IT.