[Bug]: Spawning of Allays not disabled while animals and monsters are both set to false

[Waterman1001]

/mv version -p output

https://paste.gg/p/anonymous/b8521e6e7e7b4bf5affe877dea55295d

Server logs

Irrelevant for this bug report as there is no console error

Server Version

[02:32:08 INFO]: Checking version, please wait...
[02:32:08 INFO]: This server is running Paper version 1.21.1-119-master@7cd4f2c (2024-10-03T15:19:34Z) (Implementing API version 1.21.1-R0.1-SNAPSHOT)
You are 1 version(s) behind
Download the new version at: https://papermc.io/downloads/paper
Previous version: git-Paper-497 (MC: 1.20.4)

Bug Description

Even though 'mv modify set animals' and also the same for monsters were both set to false, players are still able to spawn Allays.
I was being told by Zax71 in Discord that this is because Allays aren't in the standard set of mob groups.
He requested me to create this GitHub issue about it.

Thank you in advance for fixing it!

Steps to reproduce

1. Disable monsters and animals for a specific world using /mv modify set <monsters/animals> false
2. Spawn allay using spawn egg
3. Allay will still spawn.

Agreements

• I have searched for and ensured there isn't already an open or resolved issue(s) regarding this.
• I was able to reproduce my issue on a freshly setup and up-to-date server with the latest version of Multiverse plugins with no other plugins and with no kinds of other server or client mods.

[benwoo1110]

Does it spawn naturally as well?

[Waterman1001]

I am unsure, sorry. I use it in a creative Flat world to disable spawning, e.g. via Spawn Eggs, but it is quite hard to find a place where Allays would expected to naturally spawn then.