Command ignores capital letters and give an incorrect feedback

/summon Husk ~ ~ ~

/give @p Stone 1

/summon husk ~ ~ ~ {HandItems:[{id:Stone,Count:1},{}]}

1.12.2:
/setblock ~ ~ ~ minecraft:mob_spawner 0 replace {SpawnData:{id:"husk",HandItems:[{id:Stone,Count:1},{}]}} 

18w05a:
/setblock ~ ~ ~ minecraft:mob_spawner{SpawnData:{id:"husk",HandItems:[{id:Stone,Count:1},{}]}} replace

1.12.2:
/setblock ~ ~ ~ minecraft:mob_spawner 0 replace {SpawnData:{id:"Husk"}} 

18w05a:
/setblock ~ ~ ~ minecraft:mob_spawner{SpawnData:{id:"Husk"}} replace