What I expected to happen was when I looked at the sign it would become bright like all the other blocks in the pocket edition.
What actually happened was when I looked at the sign it showed the computer hit box.
Steps to reproduce:
1. Place sign on the ground
2. Look at it and it will have the computer version hit box
If anything, wouldn't that be intentional? (Highlighting a sign would make it a little more difficult to read the text, probably too)