Creating island pattern, it don't actually save item inside any container

[Malachiel87]

Description

Describe the bug

Creating any island pattern it don't save any item inside chest, shulker ecc...

Steps to reproduce the behavior

Set a new island, put inside the chest something, save it using /bsb bp, at island creation the chest will be empy
Noticed it will happen also with default island pattern

Expected behavior

Shoul have items

Environment

Output of /bbox version (Mandatory)

[18:58:53 INFO]: In esecuzione su PAPER 1.17.1.
[18:58:53 INFO]: Versione BentoBox: 1.17.1
[18:58:53 INFO]: Database: JSON
[18:58:53 INFO]: Mondi di gioco caricati:
[18:58:53 INFO]: askyblock (BSkyBlock): Overworld, [nether_color]Nether, [end_color]End
[18:58:53 INFO]: Addons caricati:
[18:58:53 INFO]: Biomes 1.14.0 (ENABLED)
[18:58:53 INFO]: Border 3.2.0 (ENABLED)
[18:58:53 INFO]: BSkyBlock 1.15.0 (ENABLED)
[18:58:53 INFO]: Challenges 0.8.4 (ENABLED)
[18:58:53 INFO]: Chat 1.1.4 (ENABLED)
[18:58:53 INFO]: DimensionalTrees 1.6.0 (ENABLED)
[18:58:53 INFO]: FrameMiner 1.2.1 (ENABLED)
[18:58:53 INFO]: Level 2.7.0 (ENABLED)
[18:58:53 INFO]: Limits 1.17.0 (ENABLED)
[18:58:53 INFO]: Warps 1.10.2 (ENABLED)```

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Additional context (Optional)

[BONNe]

BentoBoxWorld/BentoBox#1805
BentoBoxWorld/BentoBox#1802

There was a bug in Spigot that was merged in Paper too, which always cleared all inventories.

I do not know if Paper has fixed it, but in Spigot version the bug is fixed.