No AI not working anymore

[Tacoo]

At first, the no ai horses kind of bugged and moved somewhat but now the no ai command just completely doesn't work. Here is the command /summon horse ~ ~ ~ {NoAi:1b,Invulnerable:1b,PersistanceRequired:1b,Rotation:[90.0f,0.0f]}. I've also tried restarting the server nothing works.

[Tacoo]

Never mind the command is: /summon horse ~ ~ ~ {NoAI: 1b,Silent:1b,PersistenceRequired:1b,Invulnerable:1b,Rotation:[0.0f,0.0f]}