Parrot legs are not aligned correctly when flying

Partner Rank:
3

Verification builds:
Beta 1.12.3 2120526

Summary:
The parrot’s legs are incorrect when flying

Impact:
This appears broken in the vanilla game. It however also affects marketplace content, especially texture packs, which retexture or remodel the parrot making them appear broken. This affects Spring Minigames and all our texture packs

Repro Steps:

1. Create a creative world
2. Spawn a parrot
3. Observe when the parrot is flying
4. Load up a 1.8 client and repeat the process
5. Observe the legs correctly position when flying

Observed Results:
The legs are incorrectly positioned when the parrots fly

Expected Results:
The legs are displayed correctly when flying

Screenshots/Videos attached:
Yes

Regression Builds:
1.8.1 1483479

Notes:
Old content will not be able to use AddEnitty to fix the animation ourselves