When hit killing a wild wolf, other wolves do not become agressive

This ticket was closed because they did not had a clear description: MC-2432 so, i made another ticket

Steps to reproduce:

1 - Give yourself effect 5 level 100 for 30 seconds

2 - spawn two or more wolves

3 - hit-kill one

4 - ????

6 - Notice that the other wolves do not became agressive

7 - Sorry for my bad english, i'm brazilian

8 - Notice that step 5 is missing