Parrots become "unsettled" after world conversion

Upon converting a world to the new version any Parrots in the world lose their "seated" status and will teleport or follow the player as soon as he comes into range.

What I expected would happen:
Upon entering the world I expected my tamed animals to remain as they were left.

What actually happened:
Whenever I came close enough any Parrots I had in the world came to me and I would have had to lead them all around and put them all back where they belonged, but they also would randomly take damage and die while I tried, so I just deleted the world and will reconvert it later.

Steps to reproduce:
1. Convert a world that has tamed Parrots "seated".
2. Observe that upon entering the world the Parrots are no longer "sitting" and will follow the player.