Critical: Too much nether monsters

[x1p]

Description
The problem is a bit too much monsters. There are approximately 600+ monsters on 1 island

For these mobs, I didn't set a limit.
BSkyblock settings:

  spawn-limits:
    # Spawn limits. These override the limits set in bukkit.yml
    # If set to a negative number, the server defaults will be used
    # Added since 1.11.2.
    monsters: -1
    # Added since 1.11.2.
    animals: -1
    # Added since 1.11.2.
    water-animals: -1
    # Added since 1.11.2.
    ambient: -1

So it should look for bukkit and the monsters from bukkit are 24. This is clearly more that 24.
I think is related to other limits issues. (Infinite bee's, slimes) But I'm not sure.

Steps to reproduce the behavior:

1. Go to the nether
2. Check to see how many mobs there are of an unlimited kind of mob

Expected behavior
Normal mob spawning behavior

Screenshots

Server Information:

[Please complete the following information:]

• Database being used (YAML, JSON, MySQL, MongoDB): [JSON]
• OS: [Linux]
• Java Version: [Java 11]
• BentoBox version: [e.g. 1.7.2.21]
• Addons installed? [Do '/bentobox version' and copy/paste from the console]

Running Invalid (PURPUR) 1.16.1.
BentoBox version: 1.15.1-SNAPSHOT-b1869
Database: JSON
Loaded Game Worlds:
bskyblock_world (BSkyBlock): Overworld, Nether, The End
Loaded Addons:
Biomes 1.13.0 (ENABLED)
BSkyBlock 1.14.1-SNAPSHOT-b673 (ENABLED)
Challenges 0.8.4-SNAPSHOT-b428 (ENABLED)
Level 2.4.1 (ENABLED)
Limits 1.15.0-SNAPSHOT-b231 (ENABLED)
MagicCobblestoneGenerator 2.2.0-SNAPSHOT-b160 (ENABLED)
Warps 1.10.1-SNAPSHOT-b267 (ENABLED)

• Other plugins? [Do '/plugins' and copy/paste from the console]

Additional context

[tastybento]

This is happening since Build 229. It will take some time to work this one out.