When placing a sign I write on it fine, but when I press done the bottom 2 lines of text disappears.

What I expected to happen was...:
All four lines of text to stay.

What actually happened was...:
Bottom 2 lines of text on the sign was gone.

Steps to Reproduce:
1. Write on all 4 lines of the sign
2. ... press done.
3. ... Bottom 2 lines disappear.