The backpack cant store the spawn egg with Entitytag

[haiman233]

❗ Checklist

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

📍 Description

The backpack cant store the spawn egg with Entitytag

📑 Reproduction Steps

1、Get the spawn egg with EntityTag nbt，the command is /give creeper_spawn_egg{EntityTag:{id:"minecraft:iron_golem"}}
2、Put the Entitytag spawn egg in the Slimefun backpack
3、Restart the server
4、Open the backpack and the backpack is empty

💡 Expected Behavior

The backpack should store the spawn egg with EntityTag，because it is very useful to administrator.

📷 Screenshots / Videos

No response

📜 Server Log

No response

📂 /error-reports/ folder

No response

💻 Server Software

Paper

🎮 Minecraft Version

1.18.x

⭐ Slimefun version

🧭 Other plugins

No response

[J3fftw1]

I assume this is the reason we block shulkers from going into a backpack aswell?

[Creependerman]

I think it's maybe because the backpack cannot save this item?

[haiman233]

Yes, but there is nothing we can do at present.