Endermen+EnderDragons kill Endermites+ Endermites dont spawn in The End

Endermen, And Ender Dragon Kill EnderMites, And endermites dont spawn in The END.
I was playing and i went into the end and spawned endermites and reconized this

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ... Go to The END and spawn endermites and endermen will attack.
3. ...Also The Ender Dragon will to, and how come endermites dont spawn in The END?