Snowman snow prevention bug

Summary

Esdrongo:
  Type: SNOWMAN
  Display: '<gradient:#33356D:#FFFFFF:#276299>esdrongo</gradient>'
  Health: 30
Options:
    AlwaysShowName: true
    MovementSpeed: 0.5
    MaxCombatDistance: 256
    PreventOtherDrops: true
    PreventMobKillDrops: true
    PreventSnowFormation: true

The options snowformation should prevent it, and it is, but if the mob dies he spawns it anyway

Proofs: https://imgur.com/a/7XiTzOW