Backpack can put into another Backpack and remain Stuck

[Edo2048]

❗ 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

backpack can put into another backpack using bundle and remained stuck

📑 Reproduction Steps

1. give 2 backpacks and 1 bundle
2. put backpack#1 into bundle
3. open backpack#2
4. put bundle with backpack#1 into backpack#2
5. right click on bundle and can put backpack#1 into backpack#2
6. backpack#1 cannot removed from backpack#2

💡 Expected Behavior

should backpack can removed from another backpack or bundle cannot put into backpack

📷 Screenshots / Videos

https://user-images.githubusercontent.com/61433249/147974256-6f9f8a7e-fa94-47cb-a813-4005af882b42.mp4

📜 Server Log

No response

📂 /error-reports/ folder

No response

💻 Server Software

Paper

🎮 Minecraft Version

1.17.x

⭐ Slimefun version

Paper git-Paper-400 (MC: 1.17.1) Slimefun DEV - 994 (git eac32ac9) Metrics-Module #28 Java 17 No Addons installed

🧭 Other plugins

No response

[Sefiraat]

While this will likely need sorting, as bundles are not yet officially release and not due until 1.19 I'm not sure this would benefit from being looked into yet as, with anything that's not released, it may well change between now and then?

[Boomer-1]

you'd think mojang would address this as I'm sure the same principle with shulker boxes would apply here, and that none of these should be able to go into another repeatedly

[Edo2048]

datapack preview of 1.17 have crafting recipe of bundle