1.16.1, 20w30a, 1.16.2 Pre-release 1
When a charged creeper explodes and, additionally to a mob which can drop a skull, there are zombie variants (e.g. husk) around, no skull might be dropped.
- Summon a charged creeper
- First summon a zombie variant (e.g. a husk)
- Then summon a mob which can drop a skull (e.g. a wither skeleton) in the same chunk
Note: The order of summoning the mobs is important (and depends on implementation details) because it determines in which order the explosion kills them.
- Ignite the creeper by right clicking it with a flint and steel
No skull is dropped
net.minecraft.world.entity.monster.Zombie.dropCustomDeathLoot(DamageSource, int, boolean) calls increaseDroppedSkulls() before actually making sure that the zombie variant can drop a skull.