Goats and ender dragons cannot be summoned to face a specific direction with commands

1.The majority of mobs can change the direction by summoning command like sheep

summon minecraft:sheep ~ ~ ~  {NoAI:1,NoGravity:1,Silent:0,PersistenceRequired:1,Rotation:[180f,0f],Invulnerable:1} 

Then the sheep face the north direction, which is influenced by the former data “180f” in the Rotation tag.(The mobs in red circle also face the correct direction (north) ,too.
2.But only goat can’t change the facing direction even change the former data of XXF in rotation tag.

summon minecraft:goat ~ ~ ~  {NoAI:1,NoGravity:1,Silent:0,PersistenceRequired:1,Rotation:[180f,0f],Invulnerable:1} 

and it still face south. (Blue circle). Change the 180f into other angles still not working.
3.The ender dragon can’t change the direction like goat, either. And the ender dragon still face south even though change the data.
Command

summon minecraft:ender_dragon ~ ~ ~ {NoAI:1,NoGravity:1,Silent:0,Rotation:[0f,0f],PersistenceRequired:1,Invulnerable:1}

The dragon still face nouth.(The left (Green circle) is Rotation:[180f,0f], the right(red cross) is Rotation:[0f,0f].