Synchronizing experience not working

[BrainStone]

Issue Description:

Synchronizing of everything is working fine, except of the experience. It always get set to 0 in the database.

What happens:

When storing the playerdata the experience gets set to 0.

What you expected to happen:

That the experience gets stored correctly

Steps to reproduce:

1. Give self 100L of experience.
2. Leave server.
3. Check database or join
4. -> 0 levels of experience

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Affected Versions:

• Minecraft: 1.11.2
• InvSync: 0.4.0-beta
• Sponge: 1.11.2-6.0.0-BETA-243

[BrainStone]

Reported bug in SpongePowered/SpongeVanilla#312

[BrainStone]

Moved bug report to SpongePowered/Sponge#1322

[BrainStone]

At the moment this is working in most cases. The only case that is not working atm is when the player recives the levels via the /xp <level>L [player] command.