When the server crashed and I logged back on, most of the items I had just put into my inventory were missing
- I moved items from my chest into my inventory.
- The server started lagging out, and it restarted.
- When it was back up, I logged in, and all the stuff I had put in from the chest were missing, like galleons, food, and other expensive stuff.
etc. Other people around me had stuff missing from their inventory too.
Hogwarts was effected in my case, but probably other worlds in the server too.