Elder Guardian drops being eaten by stacks (1 sponge per stack)

[mrcoffee1026]

Describe the bug
Get one wet_sponge per stack of elder guardians instead of one wet_sponge per elder guardians in the stack.

To Reproduce
Build elder guardian grinder so you'll have stacks of elder guardians... kill any stack, count the one sponge you get for your drop. This does not appear to affect shard, prismarine crystal or fish drops as I'm sure that was already written in for regular guardian farms.

Expected behavior
should get one sponge per mob in the stack (in our case 25x)

Screenshots/Videos

Bukkit/Spigot AND StackMob version:
stackmob v4.0.2
This server is running Paper version git-Paper-175 (MC: 1.14.4) (Implementing API version 1.14.4-R0.1-SNAPSHOT)

[SirBlobman]

I seem to have a similar issues with blazes

Paper Version: git-Paper-167 (1.14.4-R0.1-SNAPSHOT)
StackMob Version: 1.14.4

Video Upload:
https://imgur.com/N7LNuhy

Current Config:
https://gist.githubusercontent.com/SirBlobman/f8ae49f4451ef6fabd006659fda5f770/raw/4918a2ac83d20917d792ab15d4026f03e437200e/config.yml