DEVICE: Samsung Galaxy Tab A

I noticed in the the 0.16.0 beta that when attempting to use the /give skull command to give yourself a mob skull that is not already in the inventory, such as a spider head, it gives you a glitchy skeleton head instead. I understand in the PC Edition, you ARE able to get these heads through commands. And as the /give command is in PE, I was wondering why it doesn't work and often crashes the game. Thanks!

STEPS TO REPRODUCE:

1. Do the command: /give (your name here) skull 64 40
This command is supposed to give you 64 spider heads. But instead you get glitchy skeleton heads. This happens with the other mobs too.

EDIT: Could the developers have forgotten to add the textures for the other mob heads?