Empty spawner error

[100petr]

❗ Checklist

• [X] I am using the official english version of Slimefun and did not modify the jar.
• [X] I am using an up to date "DEV" (not "RC") version of Slimefun.
• [X] I am aware that issues related to Slimefun addons need to be reported on their bug trackers and not here.
• [X] I searched for similar open issues and could not find an existing bug report on this.

📍 Description

If I use the pickaxe of containment to destroy a spawner that does not have a specific mob, the broken spawner does not drop and an error appears in the console.

📑 Reproduction Steps

1. /minecraft:give nickname spawner 1
2. place the spawner
3. destroy the spawner with the pickaxe of containment
4. look in the console

💡 Expected Behavior

There will be no error in the console and the broken spawner will drop.

📷 Screenshots / Videos

https://github.com/Slimefun/Slimefun4/assets/29830635/cff78c1b-6f56-441e-91e7-f47608fb1c93

📜 Server Log

https://pastebin.com/2UnWaEcd

📂 /error-reports/ folder

No response

💻 Server Software

Purpur

🎮 Minecraft Version

1.20.x

⭐ Slimefun version

🧭 Other plugins

No response

[100petr]

1.19.3 change

[Boomer-1]

not sure if the renaming of the spawner cage had anything to do with this or not, but it is confirmed.