When switching servers by bungeecord, the inventory gets loaded from the database before the new data is written

[BrainStone]

Issue Description:

When switching servers over bungeecord, the new server loads the inventory from the database before the old one has saved it to the database

What happens:

The inventory that is stored in the database before the switch gets loaded then the inventory from the old server gets stored.

What you expected to happen:

That the inventory gets stored in the database before it gets loaded again.

Steps to reproduce:

1. Create a bungeecord server for two (or more) sponge servers
2. Install InvSync on both (and set them up to use a common data source)
3. Switch servers
4. Inventories stay the same but the correct inventory is stored in database

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Affected Versions

• Minecraft: 1.11.2
• InvSync: 0.3.8-beta
• Sponge: 1.11.2-6.0.0-BETA-243
• Other related mods: Bungeecord