When the Player starts the Tutorial, the Inventory was delete after the Tutorial.

Don't Issues in the Console. But I think the Issues came from my Plugin:

MysqlPlayerDataBridge

Because the Plugin save the Inventory und exp in a Mysql Database and when the Player starts the Tutorial the MPDB Plugin sync the empty Inv from the SPECTATOR Mode.

Have you an Idea?

Sry my englisch is bad i came from Germany.

We store, remove, then restore inventory. It sounds like your other plugin messes with that somehow.