When you summon entity with applied effect and ShowParticles set to 0, particles are still visible.
To reproduce type:
/summon Pig ~ ~ ~ {ActiveEffects:[{Id:2,Amplifier:1,Duration:100000,ShowParticles:0}]}
When you summon entity with applied effect and ShowParticles set to 0, particles are still visible.
To reproduce type:
/summon Pig ~ ~ ~ {ActiveEffects:[{Id:2,Amplifier:1,Duration:100000,ShowParticles:0}]}
Correction, try this