[BUG] Inventory save conflict when Multiverse-Inventories is also installed

[XyRealm]

Server Software

Paper

Server Version

1.21.11

Plugin Version

build

Java Version

Java 21

Bug Description

When both SinceDungeon and Multiverse-Inventories are installed on the same server, SinceDungeon's inventory saving functionality fails to work properly. Players may lose their inventory changes or experience inventory desync when entering/exiting dungeons. The issue occurs only when Multiverse-Inventories is active and managing inventories across worlds.

Steps to Reproduce

1. Install SinceDungeon and Multiverse-Inventories on a server.
2. Configure Multiverse-Inventories to manage inventories across worlds (default configuration works).
3. Enter a dungeon through SinceDungeon.
4. Make changes to your inventory (e.g., pick up or drop items).
5. Exit the dungeon.
6. Observe that the inventory changes are not properly saved or restored.

Console Errors / Stacktrace

Active Plugins

No response

Pre-submission Checklist

• I have tested this on the latest version of the plugin.
• I have searched the existing issues to ensure this bug has not already been reported.