Drowned die from falling 23 blocks, instead of 24 blocks like other zombie variants

The Bug:

Drowned die from falling 23 blocks, instead of 24 blocks like other zombie variants

Steps to Reproduce:

1. Summon a zombie 23 blocks above your position by using the command provided below.

   /summon minecraft:zombie ~ ~23 ~ {ArmorItems:[{},{},{},{id:"minecraft:iron_helmet",Count:1b}]}

2. Observe how the zombie doesn't die.
3. Summon a drowned 23 blocks above your position by using the command provided below.

   /summon minecraft:drowned ~ ~23 ~ {ArmorItems:[{},{},{},{id:"minecraft:iron_helmet",Count:1b}]}
   

4. Take note as to whether or not drowned die from falling 23 blocks, instead of 24 blocks like other zombie variants.

Observed Behavior:

The drowned dies from fall damage.

Expected Behavior:

Drowned would not die from fall damage upon falling 23 blocks.