score doesn't work anymore

I was killing mobs and after killing about 10 zombies 2 skelletons and 1 endermen I died with level 14 xp. when I died the YOU DIED! screen popped up with the options respawn and quit to title. there was also the score but it displayed 0

what I expected to happen:the game would show me my real score.

what actually happened:It showed 0

steps to reproduce:
1. kill mobs
2. die
3. look at the score