Bug High Score #4 won't register

In iOS if you get the score for the last place in the high score list. You will be prompted to enter your initials but the score will not register in the high score. It works fine if you get the higher scores 1-3. I have tested and got the same result 3-4 times.

I just ran into that issue with high score #4 earlier today, playing on an iPad2 with iOS 6.1.3. It didn't register and I wondered if that was a bug. Seems like it is.

I've experienced the same issue on Android. 4th high score position doesn't get updated.