Disconnected from the server + loss of all inventory items after logging

I don't understand what kind of bug this is, for the second time now while I'm making a map the game kicks me out and says I'm disconnected from the server, then I log in and the loot in the inventory is gone, , ............it's just gone for the second time in a period of 20 minutes.. fix this bug, thanks..It's impossible to move forward, I've already done T5 map 3 times. And it's still the same, we disconnect from the server, when I log in and look in the inventory it's gone, there's nothing, I'm already angry because it gave me a ..Greater Jeweler's Orb