Villager's tag ShowParticles with spawner is ignored

/setblock -1580 56 184 minecraft:mob_spawner 0 destroy {EntityId:"FallingSand", SpawnCount:1, Delay:1,
SpawnRange:0, MaxNearbyEntities:1, MinSpawnDelay:15, MaxSpawnDelay:20,
RequiredPlayerRange:10,SpawnPotentials:[

{Type:Villager,Weight:950,Properties:{ActiveEffects:[{Id:20,Amplifier:1,Duration:100000,Ambient:0,ShowParticles:0}],HealF:2,
CustomName:"광물 스포너 상인 Lv.1",Profession:1, Riches:0, Offers:{Recipes:[

{maxUses:99999,uses:0,buy:{id:4,Count:12,Damage:0},sell:{id:262,Count:1,Damage:0}},
{maxUses:99999,uses:0,buy:{id:4,Count:24,Damage:0},sell:{id:265,Count:1,Damage:0}},
{maxUses:99999,uses:0,buy:{id:4,Count:24,Damage:0},sell:{id:266,Count:1,Damage:0}},
{maxUses:99999,uses:0,buy:{id:265,Count:12,Damage:0},buyB:{id:266,Count:12,Damage:0},sell:{id:264,Count:1,Damage:0}},
{maxUses:99999,uses:0,buy:{id:264,Count:2,Damage:0},sell:{id:388,Count:1,Damage:0}},
{maxUses:99999,uses:0,buy:{id:264,Count:64,Damage:0},sell:{id:388,Count:32,Damage:0}},
{maxUses:99999,uses:0,buy:{id:264,Count:7,Damage:0},sell:{id:257,Count:1,Damage:0,tag:{display:{Name:"잘 안 깨져요"},ench:[{id:34, lvl:10}]}}}
]},Pos:[-1579.5,63.0,184.5]}}]}

ShowParticles is ignored when it is in spawner.

p.s. Too many bugs, and negative response in bug fixing. Why?
MC-74271
MC-74272

p.p.s. To developers, When you create some features, please do lots of tests by complicated examples. (Especially commands) You may can see lots of complicated bugs.