I tried to write a book for my realm's Jail (have not tested this on singleplayer) and the second page (with coordinates on it) continuously either gets deleted or corrupts when I close the book then open it again, or if I sign it. I attached a photo sequence of the typed page, then the corrupted page. I don't have a photo of the deleted page.

This happens on multiple books, not just a single book but every time I've tried to write. I've rewritten the book about 4 times now, as I've tried to sign it with no luck, the page with the coordinates keeps either getting deleted or corrupted.

(also, this is in release 1.6.2, your version list isn't updated)