Books don't sign properly for me! I don't get the chance to edit the title when trying to sign again!

What I expected to happen was...:
I was writing in a book and I pressed sign. I typed a name and hit cancel by accident. I pressed sign again. I thought I would get to change the name.

What actually happened was...:
I was writing a book with the book and quill. I pressed sign and publish it. I wrote the title and was about to hit sign and close, but at the last second I remembered to add something. I hit cancel and added that thing. I hit sign again, and I didn't get a chance to change the book's title. I actually messed up on the title so it looks ugly!

Steps to Reproduce:

1. Get a fresh book and quill
2. Write a short thing like "123"
3. Press "sign"
4. Make a short title like "Code"
5. Press cancel
6. Try pressing sign again
7. The Book and Quill signs without asking for the book title again

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Code analysis by Marcono1234 can be found in this comment.