Summoned goats are not properly rotated

/summon minecraft:goat ~ ~ ~ {NoAI:1b,Rotation:[180f,0f]}

/summon minecraft:goat ~ ~ ~ {NoAI:1b,Rotation:[90f,0f]}

 
This will result in two goats who are barely rotated from each other, rather than 90º apart.

This was reported before with a typo as MC-225980. As I noted there in my response, the fact that the typo of "900" for "90" existed only would have indicated a different problem, because if the two rotations were the same, the two goats should entirely overlap, while they clearly did not.

Also, if you summon a different mob next to the goat at rotation 180, it will be pointed in roughly the opposite direction – the 180.0f rotation is pretty much ignored, really. And the summoned goat is not pointing along an axis, but nearby one.

All in all, rotation on a summoned goat is broken.