Mob Transformation

[SmashinSkull]

When making a drowned grinder from a zombie spawner stacked zombies do not turn into stacked drowned. e.g. as the zombies stack up and generally get to around 8-12 with 1 zombie spawner before being underwater long enough to become a drowned, the transformed drowned keeps the name "8x Zombie" but once killed that is it as it is still only 1 mob.

Steps to reproduce the behavior:
spawn zombies fully submerged in water and they will turn to drowned, now do this again with stacked zombies and see the difference when it transforms