Kill the dragon in old version (1.8.8) and try to resurrect in 15w44a snap... Not working.

I killed the dragon in an ancient world (version 1.8.8), then I wanted to resurrect the dragon in the snap-version 15w44a version (I did the new "rite" with EnderCrystal) and nothing happened ... did not happen animation, not new pillars were created, the dragon did not appear, absolutely nothing ...

I tried to kill the dragon in snap-version 15w44a, and then resurrect in same version, and it worked.