PaperMC/paper-server/patches/sources/net/minecraft/server/commands/EffectCommands.java.patch

--- a/net/minecraft/server/commands/EffectCommands.java
+++ b/net/minecraft/server/commands/EffectCommands.java
@@ -84,7 +84,7 @@
             if (entity instanceof LivingEntity) {
                 MobEffectInstance mobeffect = new MobEffectInstance(statusEffect, k, amplifier, false, showParticles);
 
-                if (((LivingEntity) entity).addEffect(mobeffect, source.getEntity())) {
+                if (((LivingEntity) entity).addEffect(mobeffect, source.getEntity(), org.bukkit.event.entity.EntityPotionEffectEvent.Cause.COMMAND)) { // CraftBukkit
                     ++j;
                 }
             }
@@ -114,7 +114,7 @@
         while (iterator.hasNext()) {
             Entity entity = (Entity) iterator.next();
 
-            if (entity instanceof LivingEntity && ((LivingEntity) entity).removeAllEffects()) {
+            if (entity instanceof LivingEntity && ((LivingEntity) entity).removeAllEffects(org.bukkit.event.entity.EntityPotionEffectEvent.Cause.COMMAND)) { // CraftBukkit
                 ++i;
             }
         }
@@ -144,7 +144,7 @@
         while (iterator.hasNext()) {
             Entity entity = (Entity) iterator.next();
 
-            if (entity instanceof LivingEntity && ((LivingEntity) entity).removeEffect(statusEffect)) {
+            if (entity instanceof LivingEntity && ((LivingEntity) entity).removeEffect(statusEffect, org.bukkit.event.entity.EntityPotionEffectEvent.Cause.COMMAND)) { // CraftBukkit
                 ++i;
             }
         }